Chains and heterogens:
PDB Chain Sequences:
>1mrdH (H:) qvqlqqsgaelvkpgasvklsckasgytftsywmqwvkqrpgqglewigeidpsdsytny nqkfkgkatltvdtssstaymqlssltsedsavyycanlrgyfdywgqgttltvssaktt ppsvyplapgcgdttgssvtlgclvkgyfpesvtvtwnsgslsssvhtfpallqsglytm sssvtvpsstwpsqtvtcsvahpassttvdkklep
>1mrdH (H:) vqlqqsgaelvkpgasvklsckasgytftsywmqwvkqrpgqglewigeidpsdsytnyn qkfkgkatltvdstaymqlssltsedsavyycanlrgyfdywgqgttltvssakttppsv yplapgttgssvtlgclvkgyfpesvtvtwnsgslsssvhtfpallqsglytmsssvtvp sstwpsqtvtcsvahpassttvdkklep
>1mrdL (L:) dvvmtqtplslpvslgdqasiscrssqslvhsngntylhwylqkpgqspklliykvsnrf sgvpdrfsgsgsgtdftlkisrveaedlgvyfcsqsthvprtfgggtkleikradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgkerqngvlnswtdqnskdstysm sstltltkdeyerhnsytceathktstspivksfnrnec
>1mrdL (L:) dvvmtqtplslpvslgdqasiscrssqslvhsngntylhwylqkpgqspklliykvsnrf sgvpdrfsgsgsgtdftlkisrveaedlgvyfcsqsthvprtfgggtkleikradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgkerqngvlnswtdqnskdstysm sstltltkdeyerhnsytceathktstspivksfnr