>1iv4E (E:) observed residues (from ATOM records)
rigygedshrleegrplylcgllipspvgalahsdgdaamhaltdallsayglgdigllf
pdtdprwrgersevflreamrlveargakllqaslvltldrpklgphrkalvdslsrlmr
lpqdrigltfktseglapshvqaravvlld