HMGA2 GI:62912482 high mobility group AT-hook 2 isoform b 1 msargegagq pstsaqgqpa apapqkrgrg rprkqqqept gepspkrprg 50 51 rpkgsknksp skaaqkkaea tgekrprgrp rkwdnllprt sskkktslgn 100 101 stkrsh