>6iw4A (A:) observed residues (from ATOM records)
ahcigitdrdfiegvhggtwvsatleqdkcvtvmapdkpsldisletvaidrpaevrkvc
ynavlthvkindkcpstgeahlaeenegdnackrtysdrgwgngcglfgkgsivacakft
caksmslfevdqtkiqyviraqlhvgakqenwntdiktlkfdalsgsqevefigygkatl
ecqvqtavdfgnsyiaemeteswivdrqwaqdltlpwqsgsggvwremhhlvefepphaa
tirvlalgnqegslktaltgamrvtkdtlyklhgghvscrvklsaltlkgtsykictdkm
ffvknptdtghgtvvmqvkvskgapcripvivaddltaainkgilvtvnpiastnddevl
ievnppfgdsyiivgrgdsrltyqwhke