Chains and heterogens:
PDB Chain Sequences:
>4x6yA (A:) mkkghhhhhhtscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqip alaqagyrvlamdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggm lvwymalfypervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleq nlsrtfkslfrasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgf rgplnwyrnmernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghi edcghwtqmdkptevnqilikwldsdarnppvvskm
>4x6yA (A:) tscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqipalaqagyrvl amdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggmlvwymalfyp ervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleqnlsrtfkslf rasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgfrgplnwyrnm ernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghiedcghwtqmd kptevnqilikwldsd
>4x6yB (B:) mkkghhhhhhtscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqip alaqagyrvlamdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggm lvwymalfypervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleq nlsrtfkslfrasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgf rgplnwyrnmernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghi edcghwtqmdkptevnqilikwldsdarnppvvskm
>4x6yB (B:) tscnpsdmshgyvtvkprvrlhfvelgsgpavclchgfpeswyswryqipalaqagyrvl amdmkgygessappeieeycmevlckemvtfldklglsqavfighdwggmlvwymalfyp ervravaslntpfipanpnmsplesikanpvfdyqlyfqepgvaeaeleqnlsrtfkslf rasdesvlsmhkvceagglfvnspeepslsrmvteeeiqfyvqqfkksgfrgplnwyrnm ernwkwackslgrkilipalmvtaekdfvlvpqmsqhmedwiphlkrghiedcghwtqmd kptevnqilikwldsd