Chains and heterogens:
PDB Chain Sequences:
>4exyA (A:) melpnimhpvaklstalaaalmlsgcmpgeirptigqqmetgdqrfgdlvfrqlapnvwq htsyldmpgfgavasnglivrdggrvlvvdtawtddqtaqilnwikqeinlpvalavvth ahqdkmggmdalhaagiatyanalsnqlapqegmvaaqhsltfaangwvepatapnfgpl kvfypgpghtsdnitvgidgtdiafggclikdskakslgnlgdadtehyaasarafgaaf pkasmivmshsapdsraaithtarmadklrlv
>4exyA (A:) gdqrfgdlvfrqlapnvwqhtsyldmpgfgavasnglivrdggrvlvvdtawtddqtaqi lnwikqeinlpvalavvthahqdkmggmdalhaagiatyanalsnqlapqegmvaaqhsl tfaangwvepatapnfgplkvfypgpghtsdnitvgidgtdiafggclikdskakslgnl gdadtehyaasarafgaafpkasmivmshsapdsraaithtarmadklrlv
>4exyB (B:) melpnimhpvaklstalaaalmlsgcmpgeirptigqqmetgdqrfgdlvfrqlapnvwq htsyldmpgfgavasnglivrdggrvlvvdtawtddqtaqilnwikqeinlpvalavvth ahqdkmggmdalhaagiatyanalsnqlapqegmvaaqhsltfaangwvepatapnfgpl kvfypgpghtsdnitvgidgtdiafggclikdskakslgnlgdadtehyaasarafgaaf pkasmivmshsapdsraaithtarmadklrlv
>4exyB (B:) tigqqmetgdqrfgdlvfrqlapnvwqhtsyldmpgfgavasnglivrdggrvlvvdtaw tddqtaqilnwikqeinlpvalavvthahqdkmggmdalhaagiatyanalsnqlapqeg mvaaqhsltfaangwvepatapnfgplkvfypgpghtsdnitvgidgtdiafggclikds kakslgnlgdadtehyaasarafgaafpkasmivmshsapdsraaithtarmadklrlv