Chains and heterogens:
PDB Chain Sequences:
>1mrfH (H:) vqlqqsgaelvkpgasvklsckasgytftsywmqwvkqrpgqglewigeidpsdsytnyn qkfkgkatltvdtssstaymqlssltsedsavyycanlrgyfdywgqgttltvssakttp psvyplapgcgdttgssvtlgclvkgyfpesvtvtwnsgslsssvhtfpallqsglytms ssvtvpsstwpsqtvtcsvahpassttvdkklep
>1mrfH (H:) vqlqqsgaelvkpgasvklsckasgytftsywmqwvkqrpgqglewigeidpsdsytnyn qkfkgkatltvdstaymqlssltsedsavyycanlrgyfdywgqgttltvssakttppsv yplapgssvtlgclvkgyfpesvtvtwnsgslsssvhtfpallqsglytmsssvtvpsst wpsqtvtcsvahpassttvdkklep
>1mrfL (L:) dvvmtqtplslpvslgdqasiscrssqslvhsngntylhwylqkpgqspklliykvsnrf sgvpdrfsgsgsgtdftlkisrveaedlgvyfcsqsthvprtfgggtkleikradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgkerqngvlnswtdqnskdstysm sstltltkdeyerhnsytceathktstspivksfnr