>2b4sB (B:) observed residues (from ATOM records)
dewevsrekitllrelgqgsfgmvyegnardiikgeaetrvavktvnesaslreriefln
easvmkgftchhvvrllgvvskgqptlvvmelmahgdlksylrslrpeaennpgrppptl
qemiqmaaeiadgmaylnakkfvhrdlaarncmvahdftvkigdfgmtrdiyetdyyrkg
gkgllpvrwmapeslkdgvfttssdmwsfgvvlweitslaeqpyqglsneqvlkfvmdgg
yldqpdncpervtdlmrmcwqfnpnmrptfleivnllkddlhpsfpevsffhseenk