>4aa7A (A:) observed residues (from ATOM records)
lsrlervyqseqaeklllagvmlrdparfdlrgtlthgrdveidtnviiegnvtlghrvk
igtgcviknsvigddceispytvvedanlaaactigpfarlrpgaellegahvgnfvemk
karlgkgskaghltylgdaeigdnvnigagtitcnydgankfktiigddvfvgsdtqlva
pvtvgkgatiaagttvtrnvgenalaisrvpqtqkegwrrpv