these observations , together with the finding that an aplastidic mutant ( strain w ( 3 ) bul , which has neither significant plastid structure nor detectable chloroplast dna ) contains low levels of the chloroplastic synthetases , indicate that the chloroplastic synthetases are transcriptional products of nuclear genes and are translated on cytoplasmic ribosomes prior to compartmentalization within the chloroplasts .
C0010834
cytoplasmic
C0035553
ribosomes