Chains and heterogens:
PDB Chain Sequences:
>2nrsA (A:) mefttglmsldtalnemlsrvtpltaqetlplvqcfgrilasdvvspldvpgfdnsamdg yavrladiasgqplpvagksfagqpyhgewpagtcirimtgapvpegceavvmqeqteqm dngvrftaevrsgqnirrrgedisagavvfpagtrlttaelpviaslgiaevpvirkvrv alfstgdelqlpgqplgdgqiydtnrlavhlmleqlgcevinlgiirddphalraafiea dsqadvvissggvsvgeadytktileelgeiafwklaikpgkpfafgklsnswfcglpgn pvsatltfyqlvqpllaklsgntasglparqrvrtasrlkktpgrldfqrgvlqrnadge levtttghqgwhifssfslgncfivlerdrgnvevgewvevepfnalfggl
>2nrsA (A:) lmsldtalnemlsrvtpltaqetlplvqcfgrilasdvvspldvpgfdnsamdgyavrla diasgqplpvagksfagqpyhgewpagtcirimtgapvpegceavvmqeqteqmdngvrf taevrsgqnirrrgedisagavvfpagtrlttaelpviaslgiaevpvirkvrvalfstg delqlpgqplgdgqiydtnrlavhlmleqlgcevinlgiirddphalraafieadsqadv vissggvsvgeadytktileelgeiafwklaikpgkpfafgklsnswfcglpgnpvsatl tfyqlvqpllaklsgntasglparqrvrtasrlkktpgrldfqrgvlqrnadgelevttt ghqgwhifssfslgncfivlerdrgnvevgewvevepfnalfg
>2nrsB (B:) mefttglmsldtalnemlsrvtpltaqetlplvqcfgrilasdvvspldvpgfdnsamdg yavrladiasgqplpvagksfagqpyhgewpagtcirimtgapvpegceavvmqeqteqm dngvrftaevrsgqnirrrgedisagavvfpagtrlttaelpviaslgiaevpvirkvrv alfstgdelqlpgqplgdgqiydtnrlavhlmleqlgcevinlgiirddphalraafiea dsqadvvissggvsvgeadytktileelgeiafwklaikpgkpfafgklsnswfcglpgn pvsatltfyqlvqpllaklsgntasglparqrvrtasrlkktpgrldfqrgvlqrnadge levtttghqgwhifssfslgncfivlerdrgnvevgewvevepfnalfggl
>2nrsB (B:) lmsldtalnemlsrvtpltaqetlplvqcfgrilasdvvspldvpgfdnsamdgyavrla diasgqplpvagksfagqpyhgewpagtcirimtgapvpegceavvmqeqteqmdngvrf taevrsgqnirrrgedisagavvfpagtrlttaelpviaslgiaevpvirkvrvalfstg delqlpgqplgdgqiydtnrlavhlmleqlgcevinlgiirddphalraafieadsqadv vissggvsvgeadytktileelgeiafwklaikpgkpfafgklsnswfcglpgnpvsatl tfyqlvqpllaklsgntasglparqrvrtasrlkktpgrldfqrgvlqrnadgelevttt ghqgwhifssfslgncfivlerdrgnvevgewvevepfnalfg