from the absence in two mutants ( valpha , isigna ) of the small subunit of ribulose-1,5-bisphosphate carboxylase , which is known to be coded for by nuclear dna and to be synthesized on cytoplasmic ribosomes , it appears that the genetic system of the plastids is capable of interfering with the genome-controlled synthesis of plastid components .
C0010834
cytoplasmic
C0035553
ribosomes