||Huang CY, Ayliffe MA, Timmis JN. Direct measurement of the transfer rate of chloroplast DNA into the nucleus. Nature. 2003 Mar 6 422(6927):72-6. p.72 right column top paragraphPubMed ID12594458
||Kaneko T. et al., Sequence analysis of the genome of the unicellular cyanobacterium Synechocystis sp. strain PCC6803. II. Sequence determination of the entire genome and assignment of potential protein-coding regions. DNA Res. 1996 Jun 30 3(3):109-36.PubMed ID8905231
||"The genomes of cytoplasmic organelles have been depleted during endosymbiotic evolution, as many genes were either lost or transferred to the nucleus. The plastome of higher plants has been reduced to approximately 130 genes (BNID 106553) from an ancestral cyanobacterial genome that probably contained over 3,000 genes (primary source)."