Chains and heterogens:
PDB Chain Sequences:
>4x6xA (A:) mkkghhhhhhtscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqip alaqagyrvlamdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggm lvwymalfypervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleq nlsrtfkslfrasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgf rgplnwyrnmernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghi edcghwtqmdkptevnqilikwldsdarnppvvskm
>4x6xA (A:) tscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqipalaqagyrvl amdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggmlvwymalfyp ervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleqnlsrtfkslf rasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgfrgplnwyrnm ernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghiedcghwtqmd kptevnqilikwldsd
>4x6xB (B:) mkkghhhhhhtscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqip alaqagyrvlamdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggm lvwymalfypervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleq nlsrtfkslfrasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgf rgplnwyrnmernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghi edcghwtqmdkptevnqilikwldsdarnppvvskm
>4x6xB (B:) tscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqipalaqagyrvl amdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggmlvwymalfyp ervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleqnlsrtfkslf rasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgfrgplnwyrnm ernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghiedcghwtqmd kptevnqilikwldsd