Chains and heterogens:
PDB Chain Sequences:
>1r42A (A:) msssswlllslvavtaaqstieeqaktfldkfnheaedlfyqsslaswnyntniteenvq nmnnagdkwsaflkeqstlaqmyplqeiqnltvklqlqalqqngssvlsedkskrlntil ntmstiystgkvcnpdnpqeclllepglneimansldynerlwaweswrsevgkqlrply eeyvvlknemaranhyedygdywrgdyevngvdgydysrgqliedvehtfeeikplyehl hayvraklmnaypsyispigclpahllgdmwgrfwtnlysltvpfgqkpnidvtdamvdq awdaqrifkeaekffvsvglpnmtqgfwensmltdpgnvqkavchptawdlgkgdfrilm ctkvtmddfltahhemghiqydmayaaqpfllrnganegfheavgeimslsaatpkhlks igllspdfqedneteinfllkqaltivgtlpftymlekwrwmvfkgeipkdqwmkkwwem kreivgvvepvphdetycdpaslfhvsndysfiryytrtlyqfqfqealcqaakhegplh kcdisnsteagqklfnmlrlgksepwtlalenvvgaknmnvrpllnyfeplftwlkdqnk nsfvgwstdwspyad
>1r42A (A:) stieeqaktfldkfnheaedlfyqsslaswnyntniteenvqnmnnagdkwsaflkeqst laqmyplqeiqnltvklqlqalqqngssvlsedkskrlntilntmstiystgkvcnpdnp qeclllepglneimansldynerlwaweswrsevgkqlrplyeeyvvlknemaranhyed ygdywrgdyevngvdgydysrgqliedvehtfeeikplyehlhayvraklmnaypsyisp igclpahllgdmwgrfwtnlysltvpfgqkpnidvtdamvdqawdaqrifkeaekffvsv glpnmtqgfwensmltdpgnvqkavchptawdlgkgdfrilmctkvtmddfltahhemgh iqydmayaaqpfllrnganegfheavgeimslsaatpkhlksigllspdfqedneteinf llkqaltivgtlpftymlekwrwmvfkgeipkdqwmkkwwemkreivgvvepvphdetyc dpaslfhvsndysfiryytrtlyqfqfqealcqaakhegplhkcdisnsteagqklfnml rlgksepwtlalenvvgaknmnvrpllnyfeplftwlkdqnknsfvgwstdwspyad