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Biochemistry Q 1 - fcbarcelona
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11-26-2010, 12:31 PM
which of the following amino acids would most likely be found on the surface of a protein molecule?
A. Alanine. B. Arginine. C. Isolucine. D. Leucine. E. Phenylalanine. F. Tryptophan.
11-26-2010, 03:04 PM
no my friend ..
correct answer is B. hydrophilic amino acid are most likely to appear on the surface of a protein. Arginine is positively charged at normal pH .. thus it's hydrophilic aa .. and is the correct answer
11-27-2010, 10:13 AM
so is arginine the only one tht is hydrophilic..can u explain plz..or any place to clear this concept..not getting much info online
11-27-2010, 10:48 AM
well. i guess any amino acid which has negative or positive charge at physiologic pH will do so. meaning; lysine, arginine, histidine, asparate and glutamate. when i solved the question i just searched for the one's charged ..
sorry, the explanation didn't provide more information than i previously posted .. but i will look that up for u n let u know ..
11-27-2010, 12:13 PM
any hydrophilic AA wud b a correct answer for that q... from the list above, only arginine is the hydrophilic AA, all the others are hydrophobic ones..
11-28-2010, 11:58 AM
ok thanks..
@er12 ...any other hydrophilic not in this list?
11-29-2010, 02:49 PM
Arginin is the onle one of those that is hydrophilic..
other hyhdrophilics are wat fcbarca said, inaddition to cysteine, threonine, serine.. u can find them in kaplan AA chapter.. |
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