For the first time, in this Note is presented the existence of four diversity types of protein amino acids (AAs). Fist type with two AAs (G; P); second with four AAs (A, L; V, I); third with six AAs (F, Y, H, W; C, M); and fourth type with eight AAs (S, T, D, E; N, Q; K, R).

NOTES ABOUT GENETIC CODE, NOTE 1: FOUR DIVERSITY TYPES OF PROTEIN AMINO ACIDS (Version 2)