RNF31 and cancer: In the TA of LLC‐bearing mice, a model of cancer cachexia but in C57BL/6 background, the mRNA levels of p47, Ufd2, Nploc4, and Herpud1 were all induced by about 50%, while Ufd1, Derl1, Rnf31, and Hsp90 did not change (Figure5B).