Genetic Code: Four Diversity Types of Protein Amino Acids 18. januara 2014.Research Notesmain From: arXiv:1107.1998v1 [q-bio.OT] From Abstract: Four diversity types of protein amino acids: 1. (G, P), 2. [(A, L), (V, I)], 3. [(F, Y), (H, W), (C, M)], 4. [(S, T), (D, E), (N, Q), (K, R)]. Genetic Code: Four Diversity Types of Protein Amino Acids