MXRA5 and colorectal carcinoma: However, our data suggests that the protein expression of MXRA5 was aberrantly high in CRC tissues while the mRNA expression was not, which is inconsistent with the study by Zou et al. The reasons for this are mainly due to sample size; Zou et al only experimented with 13 CRC tissues, compared with our 156 CRC tissues for protein expression and 70 CRC tissues for mRNA expression.