>1iv4A (A:) observed residues (from ATOM records)
rigygedshrleegrplylcgllipspvgalahsdgdaamhaltdallsayglgdigllf
pdtdprwrgersevflreamrlveargakllqaslvltldrpklgphrkalvdslsrlmr
lpqdrigltfktseglapshvqaravvlld