Chains and heterogens:
PDB Chain Sequences:
>2r88A (A:) agfqlnefsssglgraysgegaiaddagnvsrnpalitmfdrptfsagavyidpdvnisg tspsgrslkadniaptawvpnmhfvapindqfgwgasitandlatefndtyaggsvggtt dletmnlnlsgayrlnnawsfglgfnavyarakierfagdlgqlvagqimqspagqtqqg qalaatangidsntktahlngnqwgfgwnagilyeldknnryaltyrsevkidfkgnyss dlnrafnnyglpiptatggatqsgyltlnlpemwevsgynrvdpqwaihyslaytswsqf qqlkatstsgdtlfqkhegfkdayrialgttyyyddnwtfrtgiafddspvpaqnrsisi pdqdrfwlsagttyafnkdasvdvgvsymhgqsvkinegpyqfesegkawlfgtnfnyaf hhhhhh
>2r88A (A:) fqlnefsssglgraysgegaiaddagnvsrnpalitmfdrptfsagavyidpdvnisgts psgrslkadniaptawvpnmhfvapindqfgwgasitandlatefndtyaggsvggttdl etmnlnlsgayrlnnawsfglgfnavyarakierfagdlgqlvagqimqspagqtqqgqa laatangidsntktahlngnqwgfgwnagilyeldknnryaltyrsevkidfkgtlnlpe mwevsgynrvdpqwaihyslaytswkdayrialgttyyyddnwtfrtgiafddspvpaqn rsisipdqdrfwlsagttyafnkdasvdvgvsymhgqsvkinegpyqfesegkawlfgtn fnyaf
>2r88B (B:) agfqlnefsssglgraysgegaiaddagnvsrnpalitmfdrptfsagavyidpdvnisg tspsgrslkadniaptawvpnmhfvapindqfgwgasitandlatefndtyaggsvggtt dletmnlnlsgayrlnnawsfglgfnavyarakierfagdlgqlvagqimqspagqtqqg qalaatangidsntktahlngnqwgfgwnagilyeldknnryaltyrsevkidfkgnyss dlnrafnnyglpiptatggatqsgyltlnlpemwevsgynrvdpqwaihyslaytswsqf qqlkatstsgdtlfqkhegfkdayrialgttyyyddnwtfrtgiafddspvpaqnrsisi pdqdrfwlsagttyafnkdasvdvgvsymhgqsvkinegpyqfesegkawlfgtnfnyaf hhhhhh
>2r88B (B:) fqlnefsssglgraysgegaiaddagnvsrnpalitmfdrptfsagavyidpdvnisgts psgrslkadniaptawvpnmhfvapindqfgwgasitandlatefndtyaggsvggttdl etmnlnlsgayrlnnawsfglgfnavyarakierfagdlgqlvagqimqspagqtqqgqa laatangidsntktahlngnqwgfgwnagilyeldknnryaltyrsevkidfkgtlnlpe mwevsgynrvdpqwaihyslaytswkdayrialgttyyyddnwtfrtgiafddspvpaqn rsisipdqdrfwlsagttyafnkdasvdvgvsymhgqsvkinegpyqfesegkawlfgtn fnyaf