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bio q 3 - mamamia
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06-11-2005, 04:22 PM
Which of the following amino acids would most likely to be found on the surface of a protein molecule?
1/Alanine 2/Arginine 3/Isoleucine 4/Leucine 5.Phenylalanine 6/Trytptophan
06-11-2005, 04:46 PM
protien is made of histone(as string) n histones r made of lysine n arginine
06-11-2005, 05:01 PM
Explanation
This Q reguares two logical steps: first ,u need to appresiate that the hydrophiklic amino acids are more likely to appear on the surface of a protein molecule,while hydrophobic amino acids are m.likely found in its interior. Next ,yuo need to figure out which of the amino acids listet is hydrophilic. If u recall that arginine is a basic amino acid that is positively charged at physiologic pH,you should be able to answer right away. All of the other choises have neutral side chains and are uncharged at physiologic pH.They would m.likely be in the hydrophobic core of the protein structure, Alanine.Isoleucine and Leucine all have aliphatic side chains Phenylalanin &tryptophan have aromatic side chains
06-11-2005, 06:29 PM
Anyone has a neumonic to remember hydrophobis/hydrophillic to neutral aa's?
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