Q74
Downstream processing of an industrial process yielded a highly purified bioactive protein. This protein was subjected to cleavage by trypsin. Chromatographic separation of products resulted in 4 peptides (P, Q, R, S) with the following amino acid sequences. P. Phe-Val-Met-Val-Arg Q. Ala-Ala-Try-Gly-Lys R. Val-Phe-Met-Ala-Gly-Lys S. Phe-Gly-Try-Ser-Thr Chemical cleavage of the same protein with cyanogen bromide and chromatographic separation resulted in three peptides (i, ii, iii) with the following sequences (i) Ala-Gly-Lys-Phe-Gly-Try-Ser-Thr (ii) Ala-Ala-Try-Gly-Lys-Phe-Val-Met (iii) Val-Arg-Val-Phe-Met The order of the peptides that gives the primary structure of the original protein is
A.
P, Q, R, S
B.
Q, P, R, S
AnswerC.
Q, R, P, S
D.
R, Q, P, S
Answer: Option B
Solution
Answer: Option B
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