Reistance mutation character state

This matrix provides the mutation state for each snake species (NA for missing data). Resistance mutations are encoded with 1, and the non-resistant mutation with 0. The two data columns give the two mutations in order.本矩阵提供了每种蛇类的突变状态，缺失数据以NA标记。耐药突变编码为1，非耐药突变编码为0。两列数据依次对应两种突变。