GenBank Record for Variant m.257A>G
154 FL sequences: 144 Main / 6 aDNA / 4 cancer, cell lines or cybrids; 103 CR sequences
click hyperlink to view GenBank Record, PubMed Reference, and Mitomaster running results

Count of the Variant in the Three hmtDNA Lineages in Mitomap
LineageL (African)
(6668 sequences)		M (Asian)
(12798 sequences)		N (Eurasian)
(42378 sequences)		All
(61883 sequences)
Count153136154
Frequency in each lineage0.22%
(15/6668)		0.02%
(3/12798)		0.32%
(136/42378)		-
Frequency overall0.02%
(15/61883)		0.00%
(3/61883)		0.22%
(136/61883)		0.25%
(154/61883)

* Footnotes:

Full Length (FL) sequences are now classified into three subsets: aDNA for ancient DNA, CancerCL for cancer, tumor, other abnormal tissues, or cell line studies (include cybrids), and Main for the rest.

The current sequence counts are from two sets of human mitochondrial sequences collected from GenBank on Jun 28, 2025. These sets consist of: