Answer the following seven questions (a through g) based upon a tripeptide seque

Question

Answer the following seven questions (a through g) based upon a tripeptide sequence with the following amino acids (one-letter symbols are given): a) What are the full names of the amino acids? Spelling counts, but capitalization does not For an acidic amino acid, assume it is ionized and use the -ate ending instead of ic acid. S: V: K: b) What are the three-letter abbreviations for the amino acids? S: V: K: c) What is the overall charge of the most abundant tripeptide species at neutral pH (pH 7.0)? Number Enter your answer as a whole number. d) At physiological pH, what is the best description of the chemical properties of the side chain (R group)? S: Selet answerSelect ansrK: Selot anger V Select answer K: Select answer

Explanation / Answer

a) S-serine,. V-valine, L-lysine

b) S-ser, V-val, L-lys

c) the tripeptide SVK has a side chain NH2 group (basic tripeptide) so at pH=7 it exist as cationic zwitter ion so it's overall charge is +1

d) serine has CH2OH GROUP , valine has CH3 group, lysine has C4H8NH2 group

e)in strong acidic medium SVK exist as dictation(+2)

f) in strong basic medium it exist as monoanion (-1)

g) side chain NH2 has hydrogen bond with water

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