Question

8:20 PM Draw the structure of the peptide abbreviated PARTY as it would exist at physiological pH Calculate the isoelectric point for this peptide. (Use pK values from Table 4-1.) 4.

Answer 1

We follow the rules of the one letter and 3 letter abbreviations used to denote the different molecules.

Expanding the abbreviation for the peptide molecule we get the following components--

P- stands for Proline [ Pro]

A- stands for Alanine [Ala]

R- stands for Argenine [Arg]

T -stands for Threonine [Thr] and

Y- stands for Tyrosine [ Tyr]

The peptide molecule will be--

Pro--- Ala--- Arg--- Thr---Tyr

So , the structure of the peptide molecule will be as shown in the above figure. We have followed the rules set by the IUPCN. The skeletal structure will be represented by formation of peptide bonds between the molecules.