Histidine

That’s the 3D model of a molecule structure of a very important amino acid. So, here is the 3D model of Histidine molecule structure. Thus, 3D Histidine is an essential 3D amino acid that has as a positively charged imidazole functional group. The 3D imidazole makes the 3D Histidine a common participant in enzyme catalyzed reactions. The unprotonated imidazole is nucleophilic and can serve as a general base, while the protonated form can serve as a general acid. The residue can also serve a role in stabilizing the folded structures of proteins 3D.