ISSUE:

Well, if you can help me with this problem,
the amino acids are
leucine
threonine and glycine
, and a tripeptide is formed between these three.
I know that threonine will act first as a substrate because the OH group that it has gives it charge density and the one that will act is more stable. Leucine would be the nucleophile and then glycine, but I don't know what the mechanism is.

Hello, check this address, in it you have the steps to form dipeptides, tripeptides...

{note} www.quimicaorganica.org/aminoacidos-pept...-proteinas/index.php {/note}

Tell us about your doubts

Regards arise