^Details on the testing of the Imperial remains are contained in Rogaev, E.I., Grigorenko, A.P., Moliaka, I.K., Faskhutdinova, G., Goltsov,A., Lahti, A., Hildebrandt, C., Kittler, E.L.W. and Morozova, I., "Genomic identification in historical case of Nicholas II Royal family.", Proceedings of the National Academy of Sciences, (2009). The mitochondrial DNA of Alexandra, Alexei, and Maria are identical and of haplogroup H1. The mitochondrial DNA of Nicholas was haplogroup T2. Their sequences are published at GenBank as FJ656214, FJ656215, FJ656216, and FJ656217.