On the other hand, the frequencies of MICA ∗A6 and ∗A9 that carry relatively longer repetitions of GCT are significantly less frequent in Chinese patients with CRC, and MICA ∗A4, which carries the shortest repetition of GCT, was increased in Chinese patients with CRC carrying a KRAS mutation at codon 12 (Supplementary Table S1). Here, KRAS is linked to colorectal carcinoma.