What is Lines: Definition and 1000 Discussions

Long interspersed nuclear elements (LINEs) (also known as long interspersed nucleotide elements or long interspersed elements) are a group of non-LTR (long terminal repeat) retrotransposons that are widespread in the genome of many eukaryotes. They make up around 21.1% of the human genome. LINEs make up a family of transposons, where each LINE is about 7,000 base pairs long. LINEs are transcribed into mRNA and translated into protein that acts as a reverse transcriptase. The reverse transcriptase makes a DNA copy of the LINE RNA that can be integrated into the genome at a new site.
The only abundant LINE in humans is LINE1. The human genome contains an estimated 100,000 truncated and 4,000 full-length LINE-1 elements. Due to the accumulation of random mutations, the sequence of many LINEs has degenerated to the extent that they are no longer transcribed or translated. Comparisons of LINE DNA sequences can be used to date transposon insertion in the genome.

View More On Wikipedia.org
Recent contents Top users
  1. L

    Equipotential Lines and Electric Fields Labratory Experiment

    Homework Statement Our lab is not online, but this is so similar to what we did. http://physics.fullerton.edu/~SAM/PDF/Lab%20Manuals/212/Individual%20Experiments/Equipotential%20Surfaces%20E6.pdf" Instead of the ten that they set their voltage to, we set ours to 12. Homework Equations...
  2. R

    Uniformly distributed electric field lines

    Homework Statement A positive charge is placed in the center of a cube. Are the intersections of the field lines with a side of the box uniformly distributed across that side. Explain. === I have missed some lectures due to getting the swine flu (ugh) and the material is not exactly...
  3. F

    Shortest distance between two lines (vector algebra)

    Homework Statement line l1 : x=2 y= -1 + p z= 2p line l2 : x=-1 + t y=1-3t z=1-2t Find the shortest (exact) distance between l1 and l2. Homework Equations That's what I am looking for! The Attempt at a Solution Thanks!
  4. V

    Proof that e-field lines don't cross

    I understand that electric field lines do not cross and a simple explanation is that it violates existence-uniqueness. I'm thinking there is a more complete explanation out there though. I think the answer lies in the realm of dynamical systems and non-linear dynamics, but it's been a whlie...
  5. G

    Electric field lines questions

    Homework Statement The electric field from two charges in the plane of the paper is represented by the dashed lines and arrows below. Select a response for each statement below. (Use 'North' towards top of page, and 'East' to the right) The force on a (-) test charge at N is directed...
  6. A

    Field Lines of Charged Particles: Speed & Emissions

    Like a radioactive particle emit rays, does this similar to the field lines of a charged particle? at what speed these field lines are generated from the charge particle?
  7. A

    The Deceptive Nature of Field Lines

    what is the meaning of deceptivness of field line?? i mean for 2d surface field line = n/2pi*r (f.l. inversly proportional to r) but for 3d surface f.l.= n/4pi*r^2 (f.l. inversly proportional to r^2), since electric field = kq/r^2?? what is the reason behind it? it written in the...
  8. T

    Straight lines as shortest connections

    Homework Statement http://img193.imageshack.us/img193/1066/65157866.png The Attempt at a Solution Since v is a constant vector, I took it out the front of the integral and used the ftc so the integral of the derivative collapses to γ(t) with terminals a to b. Evaluating leads to γ(b) -...
  9. D

    Electricity and magnetism field lines

    Are electricity and magnetism field lines the same? please be detailed!
  10. E

    Construction of lines from points

    After a rather interesting discussion in #math on freenode, I'm perplexed by the fact that there is no way to construct lines from points. For example, I initially thought of constructing a line between 0 and 1 by repeatedly dividing into two smaller halves, eg: 0,1 0,0.5,1 0,0.25,0.5,0.75,1...
  11. J

    Oscillating Electric Field Lines

    I'm have some conceptual problems with electric fields and waves. When I think of electromagnetic waves I imagine field lines emanating from a charge that is oscillating, consequently causing the field lines to oscillate. In diagrams showing field lines, the electric field runs parallel with the...
  12. B

    How Close Do You Need to Be to High Voltage Power Lines to Induce Current?

    I have a physics question that I'm hoping someone has enough free time and is intrigued enough to figure out for me! My sister just bought a house which is near some high voltage power lines. I've heard that people living near these types of lines can sometimes induce a current in wires...
  13. B

    Angle made by electric field lines

    Homework Statement an electric field line emerges from a positive point charge +q1 at an angle x to the straight line joining it to a negative charge -q2.at what angle y will the field line enter the charge -q2? Homework Equations The Attempt at a Solution sin(y/2)=sin(x/2)(q1/q2)^1/2
  14. S

    Can overhead tranmission lines be located via sattelite imagery?

    Not really sure if this is the place for this, but can overhead tranmission lines be located via sattelite imagery?
  15. T

    Photons do not travel in straight lines

    I've been thinking about this for some time now and I wanted to get some feedback on it. If photons are supposed to travel along straight lines (for the sake of simplicity let's neglect the curvature of space-time), then how could one photon possibly be used in a double slit experiment? More...
  16. M

    How can I connect two lines in 3D with restricted degree of freedom?

    Homework Statement Given two lines, in 3D, connected end to end with lengths L0 and L1, a point P0 where the first line starts, and a point P1 where you want the end of the second line to be at. Find the configurations of the lines that put the end of the second line at P1. You can restrict the...
  17. A

    Which formulas describe the magnetic field/field lines?

    hello! im not very familiar with electromagnetic fields and classical physics, so i turn to you for help, a problem: assume you have a magnetic dipole in center (0,0) of a xy plane, i want to plot the vector of the field at an arbitary point on this plane,and to plot the filedlines, how do i...
  18. W

    3 ques. Cumulative (logs,circles w/tangent lines)

    1. Simplify each expression: 2 log49 - log23 2. none 3. 2 log49 - log23 = log481 - log23 = - log23 I get - log23 when it should just be log23. What did i do wrong? 1. Find the equation of the following circle: The circle that passes through the origin...
  19. R

    Parametric Equations - Finding Tangent Lines

    So I'm looking at this example in my textbook where they're trying to find the vert. & horizontal tangent lines of r = sin Θ, 0 < Θ < pi. they say to first change it to parametric equations where x = r cos Θ = sin Θ cos Θ and y = r sin Θ = sin Θ sin Θ = sin^2 Θ But now I'm just really...
  20. R

    Metal Shavings vs infinite lines of flux

    You know how metal shavings form bows of flux lines. How is this possible since there are no discrete flux lines. I would think it should form a 2D gradient of shavings slowly graying out as they get further and further away. But you tend to see discrete lines as if at .4 inches there's a line...
  21. A

    Magnetic lines of force through soft ring

    why there is no magnetic lines of force through soft ring placed in a magnetic field ??
  22. M

    Showing skew lines lie in parallel planes

    Im givin these two lines.. L1= x=4+5t y=5+5t z=1-4t L2= x=4+s y=-6+8s z=7-3s What i tried doing was taking the directional vector of both lines <5 5 -4> <1 8 -3>, and crossing them to find the normal vector. I hav enough information to find 1 equation of a plane, but how can I find the...
  23. G

    Help with f ' (a) and tangent lines

    I'm taking calculus online and I need help figuring out how to solve the following problem. My book and notes given from my teacher do not show how to solve problems like this and I keep ending up with answers that don't work. The question is; Find f '(a) when f(t)=(3t+3)/(t+6)...
  24. J

    Show two lines are parallel & find equation for their plane

    Homework Statement Show that the two lines: L1: x = t - 3; y = 1 - 2t; z = 2t + 5.. L2: x = 4 - 2s; y = 4s + 3; z = 6 - 4s... (I changed the t's to s's for L2) are parallel, and find an equation for the plane that contains them. Homework Equations A(x - x0) + B(y - y0) + C(z - z0) =...
  25. cepheid

    Earth Atmospheric Absorption Lines

    Does anyone know a good reference for absorption lines in the Earth's atmosphere at visible and NIR wavelengths (if there are any)? For example, perhaps in the range of 3500 Å to 8000 Å? I find that the search terms are too broad to give me reasonable results on ADS. I found some atmospheric...
  26. S

    Understanding Line Intersections and Reflections in Collision Detection

    I have been coming across a very very basic mathematics problem and still can't get my head around it. Should admit not the best to really talk maths to but I need the following I am doing a collision detection algorithm.. For this I have a point that moves .I got the position of the...
  27. S

    Electric Lines of Force: Exploring Their Impact on Particle Motion

    Do the electric lines of force necessarily depict the trajectory of a charged particle? Or do they depict the trajectory at all.
  28. G

    Find Invariant Lines for Matrix Transformations | y=mx Form | Solutions

    Homework Statement Find all invariant lines, of the form y=mx for the matrix transformation. a) \left( \begin{array}{cc} 5 & 15 \\ -2 & 8 \end{array} \right) b) \left( \begin{array}{cc} 3 & -5 \\ -4 & 2 \end{array} \right) The Attempt at a Solution \left(...
  29. G

    Find Invariant Lines of Matrix Transformation y=mx+c

    Homework Statement find in the form y= mx+c, the invariant lines of the tranformation with matrix \left( \begin{array}{cc} 0 & 1 \\ 1 & 0 \end{array} \right) \left( \begin{array}{cc} 0 & 1 \\ 1 & 0 \end{array} \right)\left( \begin{array}{c} x \\ \text{mx}+c...
  30. D

    Electric/magnetic lines of force's property.

    There are certain properties of lines of force, I know they are not real, but following these 'properties', given position and intensity of magnetic/electric field sources we will be able to reconstruct these lines without any practicals. So I have a problem with lines of forces. Sources...
  31. I

    Difference between HT and LT lines

    I am doing a power distribution project, and i have come across power distribution panels, some of which are High Tension and some of which are Low Tension. I have assumed that the power lines that carry a lot of current are the ones that contribute to high tension and the compliment being...
  32. G

    Shortest distance between two lines

    Hi guys this problem should be simple enough but I just can't get the correct answer. Well the question is: Show that the shortest distance between the line (l_1) with equation \frac{x+4}{3} = \frac{y-3}{2} = \frac{z+6}{5} and the line (l_2) with equations i. x -2y -z =0 ii. x...
  33. D

    Electric/magnetic lines of force's fundamental property.

    Sources say if lines are parallel they will repel else try and merge which I don't agree and even see practically. Suppose we have 2 opposite charges facing each other, the lines are parallel, they should repel. Similarly if 2 equal charges are facing each other, the direction of the lines...
  34. A

    Magnetism: Exploring Magnetic "Lines

    Hi. I was thinking about magnetism, and remembered the classic experiment to show magnets working. Basically, you put a magnet under a piece of paper, and drop iron filings on the paper. The filings all line up along lines that curve between the poles. My question is, what are those lines? The...
  35. B

    How to plot 3D cylinder shapes in Mathematica?

    hey How can i do that? Can anyone of you help me?greets button MATHEMATICA
  36. I

    Medical Health Risks Associated with Living Near High-Voltage Power Lines

    I've never found any conclusive evidence suggesting that it does. Have there been any independant studies conducted?
  37. D

    Algebra - involving equations of lines and planes

    Homework Statement Hi guys, I was helping a friend in grade 12 with his Linear Algebra, when I got stumped on some questions I wasn't quite to sure of. I forgot some of my old linear algebra so I need you guys to help me out:) Here's the question: 1)The two line with equations L1: r =...
  38. J

    Power Loss In Transmission Lines (Again?)

    Edit: My question is better expressed in my next post so ignore this post. Homework Statement A power station delivers 890 kW of power at 12 kV to a factory through wires with total resistance 5.0 \Omega How much less power is wasted if the electricity is delivered at 50 kV rather than 12 kV...
  39. H

    Finding Umbilic Points of an Ellipsoid & Lines of Curvature

    discuss how to find the umbilic points of an ellipsoid and their connection to lines of curvature.
  40. S

    Why do spectral lines only appear as a line?

    i'm a newbie to quantum theory so bear with me please :) when hydrogen is heated in a vaccuum, the electron gets excited and moves to a higher energy level right? and then emits light as a spectral line when it moves back down to the lower energy level. my question is, why does it only show up...
  41. H

    Finding Umbilic Points on an Ellipsoid & Their Connection to Lines of Curvature

    who can help me with this: on an ellipsoid most points are not umbilic, but there are some special places that are. Discuss how to find these points and their connection to lines of curvature.
  42. M

    Electrical field lines in conductive wire

    Hi we connect a Voltage to heads of a conductive wire how will be the field lines inside Wire ? (cylinder wire) E = \rho J so ? :D field lines are parrarell inside wire ? in whole wire Electrical field is constant ? (J must be more in center of wire) what about Extreme...
  43. S

    Internet access via transmission lines?

    How can people get internet access through their power lines? Wouldn't all the transformers act as low pass filters and destroy your carrier signal? Also, with things being turned on and off constently, wouldn't it be too noisy?
  44. D

    Is this property of lines of force true for E.M?

    Considering the visual representation of an electric/magnetic field (by 'line of forces'), is this fact about the properties of lines of force true? - "Each line of force has equal strength" The websites/books are pretty timid in reviling the properties of lines of forces...at least for E.Fs.
  45. I

    Converting Energy Lines from Electron Volts

    Homework Statement "Using the conversion factor from eV (electron volts) to Joules, determine which energy line for an electron dropping from one energy level to another in the energy diagram for hydrogen above would show a line at 435 nm in an emission spectrum." Homework Equations...
  46. J

    What determines the shape and spacing of equipotential lines?

    Homework Statement What determines the shape and spacing of equipotential lines?Homework Equations NoneThe Attempt at a Solution I think the fact that equipotential lines have to be perpendicular to the surface determine the shape of the lines. I'm not sure what determines the spacing. Is it...
  47. R

    Shortest distance between lines .

    shortest distance between lines... how to find the shortest distance and the equation between the lines (x-6)/3=(y-7)/-1=(z-4)/1 & (x)/-3=(y+9)/2=(z-2)/4 ... pls help by solving it
  48. Y

    Calculus 3 problems (equations of planes and lines) 3 Space

    Hi, I am currently doing a practice test for my final exam coming up, I am wondering anyone can double check the questions to see if i did them write, below is a picture of the questions, the answers i got are listed at the bottom, If you could, please post whether you agree with my answers...
  49. H

    Transmission Lines and Op-Amps

    My understanding is that the capacitance of a typical transmission line will increase proportionally to it's length. So in the case of a simple passive LPF circuit, consisting of just the LPF and the transmission line to the load (of infinite impedance), this would in turn mean the cut-off...
  50. 3

    What is the distance between two parallel planes?

    Homework Statement 1. Find the distance betwwen the parallel palnes: a) x + y + 2z = 4 and 2x + 2y + 4z +11 = 0 b) ax + by + cz + d1 = 0 and ax + by + cz + d2 = 0 2.Find the equations of the two planes which are parallel to 2x - y + 2z = 5 and 2 unit from it Homework Equations...
Back
Top