Pyridoxal phosphate acts as a coenzyme that helps convert one of these molecules to pyruvate in a reaction (-5[1])with alpha-ketoglutarate. A compound consisting of (10[1])three of these molecules comprises a resin used in a pulldown assay to purify molecules that are fused to an S-transferase. The SECIS element directs the production of a variant of one of these molecules that incorporates selenium. These molecules, whose D-configuration is rarely found in nature, are plotted by their phi and psi dihedral angles on a Ramachandran plot. Bonds between these molecules are cleaved by trypsin. These molecules, which are differentiated by their side chains, (-5[1])are carried by tRNAs during translation. For 10 points, histidine and proline are “essential” examples of what molecules (10[1])that make up proteins? (10[1])■END■