>4imrB (B:) observed residues (from ATOM records)
mrletifglrgrtalvtgssrgigaaiaeglagagahvilhgvkpgstaavqqriiasgg
taqelagdlseagagtdlieraeaiapvdilvinasaqinatlsaltpndlafqlavnlg
stvdmlqsalpkmvarkwgrvvsigsinqlrpksvvtayaatkaaqhnliqsqardfagd
nvllntlapglvdtdrnadrraqdpegwdeyvrtlnwmgragrpeemvgaalflaseacs
fmtgetifltggy