Chains and heterogens:
PDB Chain Sequences:
>1a3rH (H:) evqlqqsgaelvrpgasvklscttsgfnikdiyihwvkqrpeqglewigrldpangytky dpkfqgkatitvdtssntaylhlssltsedtavyycdgyysyydmdywgpgtsvtvssak ttapsvyplapvcgdttgssvtlgclvkgyfpepvtltwnsgslssgvhtfpavlqsdly tlsssvtvtsstwpsqsitcnvahpasstkvdkkiepr
>1a3rH (H:) vqlqqsgaelvrpgasvklscttsgfnikdiyihwvkqrpeqglewigrldpangytkyd pkfqgkatitvdtssntaylhlssltsedtavyycdgyysyydmdywgpgtsvtvssakt tapsvyplapvcssvtlgclvkgyfpepvtltwnsgslssgvhtfpavlqsdlytlsssv tvtsstwpsqsitcnvahpasstkvdkkiepr
>1a3rL (L:) divmtqspssltvttgekvtmtckssqsllnsrtqknyltwyqqkpgqspklliywastr esgvpdrftgsgsgtdftlsisgvqaedlavyycqnnynypltfgagtklelkradaapt vsifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstys msstltltkdeyerhnsytceathktstspivksfnrnec