RPS27A and colorectal carcinoma: In addition, RPS27A (also known as UBC, S27A, CEP80, UBA80, HEL112, UBCEP1, and UBCEP80) is an extension protein on the carboxy terminus of ubiquitin (Kirschner and Stratakis, 2000[11]) and has been reported to be an early growth response gene overexpressed in human CRC (Barnard et al., 1995[1]; Wong et al., 1993[37]).