>3vk1A (A:) observed residues (from ATOM records)
viatqmtykvymsgtvnghyfevegdgkgrpyegeqtvkltvtkggplpfawdilspqcx
sipftkypedipdyvkqsfpegftwerimnfedgavctvsndssiqgncftyhvkfsgln
fppngpvmqkktqgwepsserlfarggmlignnfmalkleggghylcefkttykakkpvk
mpgyhyvdrkldvtnhnkdytsveqceisiarkpvva