I am searching for others that have had the full mitochondrial DNA test and have been assigned to the subgroup, T2b15. According to mtDNA Haplogroup T Phylogeny Based on Full Mitochondrial Sequences, published Fall 2010 in the Journal of Genetic Genealogy by Pike et al http://www.jogg.info/62/files/Pike.pdf , this subgroup is defined by an A5836G mutation and an 8281 9 bp deletion. Gene Bank accessions are JF975728 and JF979034 http://www.ncbi.nlm.nih.gov/nuccore/JF975728 . They also point out that due to a lack of genetic diversity this subgroup is estimated to be less than 500 years old.

I have submitted a GED to the WorldConnect Project, and it should be available in a few days. So far only six family lines have been included. Hopefully, as more people get tested, more family lines will be discovered. Two lines have a common, yet unidentified, ancestor. If you are unsure of what subgroup you are in and have a FASTA of your mitochondrial genome you can try Haplo Find, https://haplofind.unibo.it/ , Vianello D., Sevini F., Castellani G., Lomartire L., Capri M. and Franceschi C. (2013) HAPLOFIND: A New Method for High-Throughput mtDNA Haplogroup Assignment. Hum. Mutat. doi: 10.1002/humu.22356.

If you are interested in this project please contact me.