Proline and a few other notes
Proline (symbol Pro or P) is an organic acid classed as a proteinogenic amino acid (used in the biosynthesis of proteins), although it does not contain the amino group -NH2 but is rather a secondary amine. The secondary amine nitrogen is in
Serine
SerineĀ (symbolĀ SerĀ orĀ S)Ā is an Ī±-amino acidĀ that is used in the biosynthesis of proteins. It contains an Ī±-amino groupĀ (which is in theĀ protonatedĀ āNH+3Ā form under biological conditions), aĀ carboxyl groupĀ (which is in theĀ deprotonatedĀ āCOOāĀ form under biological conditions), a