Chains and heterogens:
PDB Chain Sequences:
>1r6bX (X:) mlnqelelslnmafararehrhefmtvehlllallsnpsarealeacsvdlvalrqelea fieqttpvlpaseeerdtqptlsfqrvlqravfhvqssgrnevtganvlvaifseqesqa ayllrkhevsrldvvnfishgtrkdeptqssdpgsqpnseeqaggeerlenfttnlnqla rvggidpligrekeleraiqvlcrrrknnpllvgesgvgktaiaeglawrivqgdvpevm adctiysldigsllagtkyrgdfekrfkallkqleqdtnsilfideihtiigagaasggq vdaanlikpllssgkirvigsttyqefsnifekdralarrfqkiditepsieetvqiing lkpkyeahhdvrytakavraavelavkyindrhlpdkaidvideagararlmpvskrkkt vnvadiesvvariaripeksvsqsdrdtlknlgdrlkmlvfgqdkaiealteaikmarag lghehkpvgsflfagptgvgktevtvqlskalgiellrfdmseymerhtvsrligappgy vgfdqgglltdavikhphavllldeiekahpdvfnillqvmdngtltdnngrkadfrnvv lvmttnagvreterksiglihqdnstdameeikkiftpefrnrldniiwfdhlstdvihq vvdkfivelqvqldqkgvslevsqearnwlaekgydramgarpmarviqdnlkkplanel lfgslvdggqvtvaldkekneltygfqsaqkhkaeaah
>1r6bX (X:) mlnqelelslnmafararehrhefmtvehlllallsnpsarealeacsvdlvalrqelea fieqttpvlpaseeerdtqptlsfqrvlqravfhvqssgrnevtganvlvaifseqesqa ayllrkhevsrldvvnfishglenfttnlnqlarvggidpligrekeleraiqvlcrrrk nnpllvgesgvgktaiaeglawrivqgdvpevmadctiysldigagtkyrgdfekrfkal lkqleqdtnsilfideihtiigagaasggqvdaanlikpllssgkirvigsttyqefsni fekdralarrfqkiditepsieetvqiinglkpkyeahhdvrytakavraavelavkyin drhlpdkaidvideagararlmpvskrkktvnvadiesvvariaripeksvsqsdrdtlk nlgdrlkmlvfgqdkaiealteaikmaraglghehkpvgsflfagptgvgktevtvqlsk algiellrfdmseymerhtvsrligappgyvgfdqgglltdavikhphavllldeiekah pdvfnillqvmdngtltdnngrkadfrnvvlvmttnagvrameeikkiftpefrnrldni iwfdhlstdvihqvvdkfivelqvqldqkgvslevsqearnwlaekgydramgarpmarv iqdnlkkplanellfgslvdggqvtvaldkekneltygfqsaqk