The complete structures of the IMQDK peptides?

confuse.To long structure..

1 Answer
Al E.
Jun 8, 2018

The sequence is of the one letter codes of amino acids (which any serious student in science should know very well).

IMQDK translates to IleMetGlnAspLys, or to be more simple:

#"Isoleucine-Methionine-Glutamine-Aspartate-Lysine"#

To draw a peptide structure, merely draw in peptide bonds, and then draw the side chains in alternating fashion with the correct stereochemistry.

puu.sh

I drew this peptide at physiological pH (#~7.4#). If the question specifies a different pH, we'd have to consider what atoms would be deprotonated or protonated.

For instance, the amino terminus #"pK"_"a" approx 9.5#, so that #"pH" = 7.4#, it would keep its proton.

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