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