>1iv4F (F:) observed residues (from ATOM records)
rigygedshrleegrplylcgllipspvgalahsdgdaamhaltdallsayglgdigllf
pdtdprwrgersevflreamrlveargakllqaslvltldrpklgphrkalvdslsrlmr
lpqdrigltfktseglapshvqaravvlld