A series of studies were originally conducted on two peptide chains linked by one or more disulfide
Question:
A series of studies were originally conducted on two peptide chains linked by one or more disulfide bridges, and it was found that the N-terminal of the peptides are Valine and Proline.
-Disulfide bridges were broken by performic acid, two cysteic acid (Cys.SO3H) residues were formed from each cystine residue initially present.
-Then, the following five parts were obtained in hydrolysis with trypsin.
Val-Ser-Lys-Cys.SO3H-Leu Gly-Cys.SO3H-Phe-Ile-Ala
Pro-Arg Glu-Trp-Cys. SO3H-Gly
Cys. SO3H-Leu-Tyr-Cys. SO3H-Arg
- Five parts were obtained by hydrolysis of the original peptide with pepsin, then treatment with performic acid.
Val-Ser-Lys-Cys.SO3H-Leu Ile-Ala
Pro-Arg-Gly-Cys.SO3H-Phe Trp- Cys.SO3H-Gly
Ty Cys.SO3H-Arg-Glu
- Part of the original sample was hydrolyzed with pepsin without treatment with performic acid and the formed parts were separated. One of these pieces was further divided with performic acid and gave the following pieces.
Val-Ser-Lys- Cys.SO3H-Leu
Trp- Cys.SO3H-Gly
What can be achieved from these results about primary structure?
A Survey of Mathematics with Applications
ISBN: 978-0134112107
10th edition
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde