>1a74A (A:) observed residues (from ATOM records)
altnaqilavidsweetvgqfpvithhvplggglqgtlhcyeiplaapygvgfakngptr
wqykrtinqvvhrwgshtvpfllepdningktctashlchntrchnplhlcweslddnkg
rnwcpgpnggcvhavvclrqgplygpgatvagpqqrgshfvv