This is Protein sequence data. Each column is a species, each row an amino acid. The amino acids were aligned using the program MAFFT (v7.187). Each amino acid is represented as a numerical value. According to this key (Python dictionary): {'-':0,'A':1,'R':2,'N':3,'D':4,'C':5,'Q':6,'E':7,'G':8,'H':9,'I':10,'L':11,'K':12,'M':13,'F':14,'P':15,'S':16,'T':17,'W':18,'Y':19,'V':20}