Table 10.2Genes Encoded by Chloroplast DNA

FunctionNumber of genes
Genes for the genetic apparatus
rRNAs (23S, 16S, 5S, 4.5S)4
tRNAs30
Ribosomal proteins21
RNA polymerase subunits4
Genes for photosynthesis
Photosystem I5
Photosystem II12
Cytochrome bf complex4
ATP synthase6
Ribulose bisphosphate carboxylase1

Sequence analysis indicates that chloroplast genomes contain about 30 genes in addition to those listed here. Some of these encode proteins involved in respiration, but most remain to be identified.

From: Chloroplasts and Other Plastids

Cover of The Cell
The Cell: A Molecular Approach. 2nd edition.
Cooper GM.
Sunderland (MA): Sinauer Associates; 2000.
Copyright © 2000, Geoffrey M Cooper.

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