MRPS31P5 and H-S chimera are not functionally equivalent.
(A) In HFF and RF cells, marmoset H-S failed to rescue the reduced cell proliferation, caused by knocking down of hMRPS31P5 or rMRPS31P5. (B) In contrast, in CJ-157 cells, the phenotype caused by knocking down of H-S could partially be rescued by human MRPS31P5.