>4rgmS (S:) observed residues (from ATOM records)
sqpdpkpdelhksskftglmenmkvlyddnhvsainvksidqflyfdliysikdtklgny
dnvrvefknkdladkykdkyvdvfganyyyqcyfskrktcmyggvtehngnqldkyrsit
vrvfedgknllsfdvqtnkkkvtaqeldyltrhylvknkklyefnnspyetgyikfiene
nsfwydmmpapgdkfdqskylmmyndnkmvdskdvkievylttk