>2c4tB (B:) observed residues (from ATOM records)
rpiiafmsdlgttddsvaqckglmysicpdvtvvdvchsmtpwdveegaryivdlprffp
egtvfatttypatgtttrsvavrikqaakggargqwagsgagferaegsyiyiapnngll
ttvleehgyleayevtspkvipeqpeptfysremvaipsahlaagfplsevgrpledhei
vrfnrpaveqdgealvgvvsaidhpfgnvwtnihrtdlekagigygarlrltldgvlpfe
apltptfadageigniaiylnsrgylsiarnaaslaypyhlkegmsarvea