YBX1 and breast cancer: YBX1 (RNA-binding proteins called RNA translation and stability regulators) could be competitively bound by a set of i-tRFs from tRNAGlu, tRNAAsp, tRNAGly, and tRNATyr, according to research by Goodarzi et al. with endogenous transcripts in BC patients to eliminate the stabilizing effect of YBX1.