'mtDNA' sequences can be found at:
mtDB - Human Mitochondrial Genome Database
Maintained by Max Ingman
Section of Medical Genetics
Department of Genetics and Pathology
Uppsala University, Sweden
The 'Entrez nucleotide' site.
For example, to get sequence AF346980
Searching with - "Homo sapiens" [ORGANISM] mitochondrion 15000[SLEN]:17000[SLEN] - would appear to give all the available sequences
Ron Scott's site
For website: Click here is also very useful.
Click here to contact Ian Logan.