>4y42A (A:) observed residues (from ATOM records)
tqslhysspretltdtimmakirknltfeainqgtglslafvtaallgqhplpeqaarvv
aekldldedairllqtiplrgsipggvptdptiyrfyemvqiygstlkalvheqfgdgii
sainfkldikkvpdpdggeravitldgkylptkpf