Radioactively labeled compounds, specifically 32 P-labeled ATP, are unsuitable for whole cell studies due to their inability to penetrate cell membranes. The presence of a radioactive isotope does not alter the chemical properties of the molecule, which means that if the compound cannot enter cells in its non-labeled form, it will also be ineffective when labeled. This conclusion is critical for researchers selecting compounds for cellular studies.
PREREQUISITESResearchers in biochemistry, molecular biology, and pharmacology who are involved in cellular studies and require an understanding of the limitations of radioactively labeled compounds.
As you said, the isotope does not change the chemical properties, so either this compound does not enter whole cells at all (regardless of whether it is labeled or not), or your information that it doesn't enter whole cells is wrong. Why do you think this?hivesaeed4 said:Some radioactively labeled compounds (such as 32 P-labeled ATP) are not suitable for studies with whole cells because they do not enter cells. Why? The presence of a radioactive isotope does not change the chemical properties of a molecule.