Chains and heterogens:
PDB Chain Sequences:
>1t66C (C:) dvvmtqtplslpvslgdqasiscrssqslvhsngntylhwylqkpgqspklliykvsnrf sgvpdrfsgsgsgtdftlkisrveaedlgvyfcsqsthvpwtfgggtkleikradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqnskdstysm sstltltkdeyerhnsytceathktstspivksfnrnec
>1t66D (D:) evkldetggglvqpgrpmklscvasgftfsdywmnwvrqspekglewvaqirnkpynyet yysdsvkgrftisrddskssvylqmnnlraedmgiyyctsygyhgaywgqgtlvtvsaak ttapsvyplapgtaalkssmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsaly tltssvtvpssswpsqtvtcnvahpasstkvdkkivprnc
>1t66H (H:) evkldetggglvqpgrpmklscvasgftfsdywmnwvrqspekglewvaqirnkpynyet yysdsvkgrftisrddskssvylqmnnlraedmgiyyctsygyhgaywgqgtlvtvsaak ttapsvyplapgtaalkssmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqsaly tltssvtvpssswpsqtvtcnvahpasstkvdkkivprnc
>1t66L (L:) dvvmtqtplslpvslgdqasiscrssqslvhsngntylhwylqkpgqspklliykvsnrf sgvpdrfsgsgsgtdftlkisrveaedlgvyfcsqsthvpwtfgggtkleikradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqnskdstysm sstltltkdeyerhnsytceathktstspivksfnrnec