Plastid DNA

DNA located in cellular organelles called chloroplasts

Plastid DNA (ptDNA), also known as chloroplast DNA (cpDNA or ctDNA) in photosynthetic organisms, is the DNA located in chloroplasts, which are photosynthetic organelles located within the cells of some eukaryotic organisms, as well as some reduced plastids, such as apicoplasts. Chloroplasts, like other types of plastid, contain a genome separate from that in the cell nucleus. The existence of chloroplast DNA was identified biochemically in 1959, and confirmed by electron microscopy in 1962.

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