>2c4bB (B:) observed residues (from ATOM records)
vintfdgvadylqtyhklpdnyitkseaqalgwvaskgnladvapgksiggdifsnregk
lpgksgrtwreadinytsgfrnsdrilyssdwliykttdayqtftkirsssmgvcpkilk
kcrrdsdclagcvcgpngfcgs