Fig 3. Alignment of ndh gene regions in both organellar genomes of Cymbidium.

A red dotted-box indicates a plastome-like region in the chondriome. A) The plastid ndhB region from 44 bp downstream of 5′ end of gene was transferred to chondriome. At exon2 of mt-ndhB, a 132 bp deletion was found. B) The mt-ndhJ-K-C region contained a large deletion in and a large insertion in mt-ndhK. The length variation between two large insertions in mt-ndhK was caused by 28 bp tandem repeats. C) In contrast with deleted plastid ndhF, two types of mt-ndhF were found in both species. D) Both ndhA exon1 and ndhH were deleted in the plastome, whereas they were found in the chondriome of both species.