Likewise , a thiacyclol is formed by adding an SH thiol moiety to a peptidyl carbonyl group .
By analogy , an oxacyclol is formed when an OH hydroxyl group is added to a peptidyl carbonyl group .
A thiacyclol is formed by adding an SH thiol moiety to a peptidyl carbonyl group .
By analogy , an oxacyclol is formed when an OH hydroxyl group is added to a peptidyl carbonyl group .