Plot of colchicine derivatives vs. cell lines. The distribution of tubulin isotypes with the highest expression levels in six cell lines, where they are exposed to 20 colchicine derivatives. The color map level 1 to 5 indicates the types of tubulin isotypes. Label "U" denotes that there are multiple isotypes that have the same highest expression level. Label "0" denotes no ME prediction can be made. All the colchicine derivatives are sorted in the order of potency (logIC50 value).