Bovine Serum Albumin and Varous Ions

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SUMMARY

This discussion centers on the binding of various ions such as Na, Cl, Ca, and Mg to Bovine Serum Albumin (BSA) in a Krebs solution at 37°C, pH 7.4, and 3 mg/dL albumin concentration. The user, Stan, has struggled to find specific data on ion binding despite extensive research using PubMed and CRC handbooks. A suggestion was made to contact the technical support of the BSA manufacturer for potential references. Additionally, a relevant study from "Biotechnol Bioeng" (1999) was cited, highlighting the impact of ionic composition on protein transport through ultrafiltration membranes and the significance of electrostatic interactions.

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  • Understanding of Bovine Serum Albumin (BSA) properties
  • Knowledge of Krebs solution composition
  • Familiarity with ultrafiltration membrane processes
  • Basic principles of electrostatic interactions in biochemistry
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  • Research the technical specifications and support resources from BSA manufacturers
  • Explore the study titled "Effect of ion binding on protein transport through ultrafiltration membranes" for detailed insights
  • Investigate the role of pH and ionic strength on protein binding and transport
  • Learn about capillary electrophoresis techniques for measuring protein mobility
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Researchers in biochemistry, biophysics, and biomedical engineering, particularly those studying protein interactions and transport mechanisms in biological systems.

Mouse Guy
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I'm dying here! I've looked on pubmed, crc handbooks, bcem texts and google.

I need to know how much of various ions Na, Cl, Ca, Mg etc. get bound to albumin in a Krebs solution at 37 celsius, pH 7.4, and 3mg/dL albumin.

I managed to track down a number and do my own test for Ca but the others are proving to be much more difficult.

Any help would be infinitely appreciated.

Thanks

Stan
 
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Well, it looks like you've tried all my likely sources. Have you tried contacting the technical support of the manufacturer supplying your BSA? Sometimes they have these types of things on-hand as references for manufacturing or QC purposes. For this particular question, it might be a long-shot, but always worth a try.

Edit:

I don't know if this one will help (I haven't read the article, just the abstract), but just in case it offers relevant references, I thought I'd toss it out for you:
Biotechnol Bioeng. 1999 May 5;63(3):298-307.

Effect of ion binding on protein transport through ultrafiltration membranes.

Menon MK, Zydney AL.

Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716, USA.

Electrostatic interactions can have a significant impact on protein transmission through semipermeable membranes. Experimental data for the transport of bovine serum albumin (BSA) through a polyethersulfone ultrafiltration membrane were obtained in different salt solutions over a range of pH and salt concentrations. Net BSA charge under the same conditions was evaluated from mobility data measured by capillary electrophoresis. The results show that specific ionic composition, in addition to solution pH and ionic strength, can strongly affect the rate of protein transport through semipermeable ultrafiltration membranes. The effects of different ions on BSA sieving are due primarily to differences in ion binding to the protein, which leads to significant differences in the net protein charge at a given pH and ionic strength. This effect could be described in terms of an effective protein radius, which accounts for the electrostatic exclusion of the charged protein from the membrane pores. These results provide important insights into the nature of the electrostatic interactions in membrane systems. Copyright 1999 John Wiley & Sons, Inc.

PMID: 10099609 [PubMed - indexed for MEDLINE]

If that's something closer than you found on your own, I searched PubMed using the keywords: ion-binding to albumin. Sometimes you just have to find the right combination of keywords to get that to pull up what you need.
 
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