The RPL44' gene from Saccharomyces cerevisiae encoding the ribosomal protein YP1 beta(L44') has been found to be linked to the STF1 gene, encoding a stabilizing factor of the F1F0-ATPase inhibitor protein from mitochondria. Evidence of this linkage comes from results obtained from Northern hybridization using a DNA probe that contains a complementary region to the 5' end of the mRNA of RPL44'. Similarly, a data bank search has shown that RPL44, encoding ribosomal protein YP2 alpha (L44) is linked to the rig gene that encodes ribosomal protein S21.