#chains in the LinkProt database with same CATH superfamily
 3N2L FG;  3N2L EFH;  3N2L DG;  3N2L CDEH;  1O5O CD;  3N2L EFGH;  3N2L BCDF;  1O5O ABCD;  3N2L ABEG;  3N2L DEF;  1A97 BC;  1O5O ABC;  3N2L ADFG;  1A97 BCD;  3N2L ADEG;  3N2L DGH;  3N2L ACDE;  3N2L CEF;  1A97 BD;  3N2L AE;  1A97 AC;  3N2L CEFG;  3N2L AEFH;  3N2L ACE;  1O5O ACD;  3N2L ABD;  3N2L AEF;  3N2L CDF;  1A97 ABD;  3N2L ABDE;  3N2L ABCD;  1A97 AD;  3N2L BCDG;  3N2L EH;  3N2L DEH;  3N2L ABE;  3N2L ADEH;  3N2L BC;  3N2L ABEF;  3N2L EFG;  3N2L DE;  3N2L ABCF;  3N2L ADG;  3N2L DFGH;  3N2L ADEF;  3N2L CDFG;  3N2L ACDG;  3N2L AB;  1A97 ABC;  3N2L ACF;  1O5O BCD;  3N2L DEFG;  3N2L EF;  3N2L AEG;  3N2L CDE;  3N2L ACEF;  1O5O BD;  3N2L CDEG;  3N2L BCD;  3N2L FGH;  1O5O ABD;  1A97 ACD;  3N2L ACEH;  3N2L AEH;  3N2L ABEH;  3N2L AEGH;  3N2L GH;  3N2L CEFH;  3N2L CD;  3N2L CDGH;  3N2L AEFG;  3N2L CF;  3N2L BCFG;  3N2L DFG;  3N2L ACFG;  1O5O BC;  3N2L EGH;  1O5O AD;  1A97 AB;  3N2L ABCE;  3N2L ADGH;  1O5O AB;  3N2L DEG;  3N2L AC;  1O5O AC;  3N2L BCEF;  3N2L CFGH;  3N2L ADE;  3N2L CFG;  3N2L EG;  3N2L ACEG;  3N2L ACDF;  3N2L CDEF;  3N2L AD;  3N2L ABC;  3N2L ACD;  3N2L DEFH;  3N2L ABDG;  3N2L DEGH;  3N2L CDG;  3N2L BCF;  3N2L BCDE; 
#chains in the LinkProt database with same CATH topology
 3ETD CEF;  3ETG BDE;  3HWX AB;  1XCB ACEF;  1XCB ADEF;  3KDP ABC;  1MV8 AC;  3N2L ABCD;  2AMF CD;  2AHR BCD;  3H3F EGH;  3ETD CD;  2AMF ABC;  3HWX 1S;  1XCB ABEF;  3GDG AC;  3HWX IJ;  1XCB ABDF;  3HWX ABZ;  3HWX BSZ;  2AHR ACE;  3N2L EFH;  3N2L DGH;  3N2L CEF;  1A97 BD;  2AHR ABCE;  1XCB BDEG;  2AMF ACD;  1E0J BCDE;  1XCB BE;  3H3F ABF;  3HWX IS;  1MUU BD;  1MV8 CD;  3ETD ADF;  1XCB BCEG;  3N2L CDEH;  1O5O CD;  3GMD BFG;  3N2L ACF;  3N2L EH;  3F7O AB;  3N2L ADEH;  1E0J ABCF;  3ETG AD;  1E0J BC;  2AMF ADE;  3ETG BCF;  1XCB ABG;  2AMF AD;  3KDP ACG;  3GVP ACD;  1MV8 BCD;  3N2L AB;  3H3F EFG;  3H3F BCD;  3GMD CDH;  3HWX 1BJ;  1XCB AE;  1EK1 AB;  1MV8 BD;  3ETD BE;  3ETG CDF;  1O5O BD;  1MUU AB;  1XCB ABFG;  1E0J AB;  2AMF ABCD;  3ETG ABE;  1A97 ACD;  3H3F BFG;  2IF0 AB;  1CR6 AB;  2ZEJ AB;  3HWX 1BR;  1ATI AB;  3HWX AZ;  3N2L GH;  3EYW AB;  2BI4 AB;  3HWX BIS;  3HGM ABC;  3N2L ACFG;  3HWX 1RZ;  1O5O BC;  1K75 AB;  1E0J DEF;  1XCB CD;  3HWX JSZ;  3N2L AE;  3HWX AS;  1XCB BDE;  2AMF ABDE;  3HWX BJZ;  3ETD ABD;  1XCB BG;  3N2L EG;  3H3F ABD;  3N2L ACEG;  1EK2 AB;  3N2L ACDF;  2AHR DE;  2AHR AB;  1E0J BF;  3H3F CDF;  3N2L ABDG;  3N2L DEGH;  1XCB ACDF;  3HWX AIJ;  1XCB BEF;  3HWX SZ;  1XCB ADF;  3KDP CDG;  3HWX BJS;  3N2L BCF;  2AMF AE;  1XCB CEG;  2AHR BD;  1A97 ABD;  3GDG BCD;  3HWX BI;  3H5A AD;  3HWX IJZ;  3N2L EFGH;  3N2L CD;  2AMF AB;  1MUU BCD;  3N2L ABEG;  3GDG BD;  3HGM AD;  3N2L DEF;  3HWX AIS;  3KDP ABD;  2AHR AE;  1O5O ABC;  3ETD BDE;  3GMD BFH;  3HWX ASZ;  3HWX BIZ;  3HWX 1AB;  1E0J BCE;  1XCB AG;  1XCB CDEG;  2AMF ABD;  3N2L ADEG;  1MFZ AB;  3ETD CDF;  1XCB ABDE;  2AMF BCDE;  3N2L ABD;  3N2L CEFG;  3H5A AC;  1E0J BCF;  3N2L ACE;  3ETG BCE;  3GMD BEF;  1XCB AEF;  3N2L CDF;  3HWX AJR;  3DO6 AB;  3ETD BEF;  3H5A ACD;  3HWX 1JR;  3N2L BCDG;  2AHR BDE;  3N2L DEH;  3N2L DEFH;  3N2L BC;  1E0J CF;  1E0J DE;  1XCB AB;  3GMD BDF;  1MUU ABD;  3HWX 1BZ;  3ETD ABF;  3ETD DE;  1XCB DEF;  3HWX 1RS;  1XCB CDF;  3ETD BCF;  1XCB BCDE;  1A97 ABC;  3N2L AD;  3ETG CEF;  1O5O BCD;  3N2L DEFG;  3DZD AB;  3HWX AJ;  3N2L CDEG;  1MUU ABC;  3ETD ACE;  3N2L BCD;  2AMF CDE;  3N2L ACEH;  3N2L AEH;  2AHR CDE;  1MV8 ABD;  1XCB ACG;  3N2L CEFH;  3F7O ABX;  3N2L CF;  3N2L BCFG;  1XCB ACE;  3N2L DFG;  3HGM AB;  3H5A BD;  3ETG ABD;  3N2L CDFG;  1XCB ABCE;  3N2L ABCE;  1XCB CDFG;  3HWX BIJ;  3H3F GH;  3HWX ISZ;  1E0J BDEF;  3GDG AB;  3GMD ADH;  3ECA BCD;  2AHR ACD;  3HWX IJS;  3H3F AFG;  1XCB CG;  3GVP BD;  3GDG AD;  3HWX AIZ;  2AMF BDE;  3ECA ACD;  3GDG ACD;  2AMF ACE;  3HWX 1IZ;  2AHR ABC;  3N2L BCDE;  1XCB BCEF;  3HGM BD;  3GMD ABF;  3N2L AEGH;  1E0J CD;  1XCB ACFG;  3N2L FG;  1LSS AB;  1E0J CEF;  1MV8 ABCD;  3N2L DEG;  3HWX 1AR;  3HWX ARZ;  2AHR BCDE;  1E0J ABCE;  3HWX ABS;  1LSS CD;  1XCB BCDG;  2AHR ABD;  1O5O AB;  1A97 AD;  1MFZ CD;  1XCB ABF;  1XCB DE;  3ETD AD;  3ETG ADE;  2AMF ACDE;  3KDP ACD;  3N2L ADE;  3HWX 1BS;  1A97 AC;  1E0J CDF;  1O5O ACD;  1E0J BEF;  3HWX 1BI;  1MUU ACD;  1E0J BCD;  3HWX ABJ;  2AMF BD;  3HWX AJZ;  1MUU AC;  1XCB CEFG;  3N2L DG;  1XCB ACEG;  1XCB ADEG;  1W5F AB;  1MV8 AB;  3ETG ABF;  1XCB ABCG;  3H5A ABD;  3N2L EGH;  3HWX BIR;  1XCB ABEG;  3HGM ABD;  3N2L DFGH;  3HWX BRS;  3H3F ACD;  2AMF ABCE;  1XCB CE;  1E0J ABEF;  2AHR ABDE;  3H3F EFH;  1E0J ABF;  2AHR ABCD;  1XCB BDEF;  1CQZ AB;  1E0J EF;  3N2L EF;  3HWX IRS;  3HWX 1A;  3GMD BCF;  3N2L ACEF;  3N2L ACDG;  2IEY AB;  3ETD BCE;  3N2L DE;  3GMD BF;  3GMD DH;  3HWX AI;  1XCB ACDE;  3N2L ABEH;  3GMD DFH;  3GVP CD;  2AHR ACDE;  1LSU AB;  3N2L CDGH;  1XCB ADFG;  3HWX 1AJ;  3HWX IRZ;  2AMF BC;  1O5O AD;  3F7O BY;  3ETD AF;  2AMF AC;  3GDG ABC;  3KDP ABG;  2AHR AD;  3N2L AC;  3HWX ARS;  3HWX 1JZ;  3HWX RSZ;  3N2L CFGH;  1XCB CDEF;  3ETD BF;  3HWX 1IJ;  3ETD CDE;  3GVP BCD;  3N2L ABE;  3N2L ACD;  1XCB AEG;  3GDG ABD;  3N2L CDG;  3N2L ABDE;  1MUU CD;  3HGM BCD;  2AMF DE;  3H3F EF;  3KDP AB;  3GMD DEH;  3N2L BCDF;  1O5O ABCD;  1A97 AB;  3KDP CD;  3HWX AR;  1A97 BC;  3ETG CF;  3N2L ADFG;  1A97 BCD;  1KAH AB;  1E0J BCDF;  3ETD ABE;  3HWX RZ;  1XCB CDE;  3HGM CD;  3HWX BRZ;  3N2L ACDE;  1MV8 ACD;  3ETD ADE;  3HWX BS;  2AMF BCD;  1XCB AEFG;  2BL4 AB;  1XCB DF;  3ETD AC;  1XCB ACDG;  1E0J BCEF;  3ETG AEF;  1XCB BEG;  3GMD BDH;  2AHR AC;  1XCB EF;  3HWX BJR;  3N2L AEFH;  1XCB BCE;  3ETG ACF;  1XCB CEF;  3DL2 AB;  2AHR ADE;  2AHR BC;  3H3F FGH;  1MV8 ABC;  3HWX BJ;  3HGM ACD;  3N2L CDEF;  3F7O ABY;  3N2L ABEF;  3GDG BC;  3GMD CD;  3HWX AIR;  3N2L EFG;  1O5O ABD;  3N2L ABCF;  1XCB AF;  3N2L ADG;  2AMF ABE;  3N2L ADEF;  3KDP BCH;  3ETG BF;  3ETG BE;  3HWX 1IR;  3N2L ABC;  3HWX IJR;  3H3F BEF;  1MUU ABCD;  3N2L CDE;  3HWX AJS;  1E0J CDEF;  1E0J ABC;  3KDP CDH;  3HWX 1AZ;  3N2L FGH;  1XCB BEFG;  3N2L AEG;  3HWX 1JS;  1X7D AB;  3N2L AEFG;  1KAR AB;  1XCB AFG;  1E0J CE;  3GDG CD;  3ETD ACF;  3GMD DGH;  3KDP BCG;  3N2L ADGH;  3HWX 1AI;  3HWX 1SZ;  1XCB CDG;  1E0J ABCD;  3HWX ABR;  2AHR ABE;  1O5O AC;  3ETG BCD;  3N2L BCEF;  1XCB ABE;  3ETG ADF;  3N2L CFG;  3N2L AEF;  3KDP ABH;  1XCB ADE;  3ETG DE;  3ETD ACD;  1XCB BCG;  1E0J CDE;  3ETG ACD;  3HWX RS;  3HWX 1Z;  3HWX ABI;  1KAE AB;  3HWX JRS;  2AHR CD; 
#chains in the LinkProt database with same CATH homology
 3N2L FG;  3HWX AB;  3N2L EFH;  3N2L ABD;  3KDP AB;  1A97 ABD;  3HWX BI;  3HWX 1AR;  3N2L GH;  3HWX IJZ;  3N2L EFGH;  3N2L BCDF;  1O5O ABCD;  3HWX 1S;  1A97 AB;  3KDP CD;  3HWX AIS;  3HWX ABS;  1A97 BC;  3KDP ABD;  3HWX 1JR;  3HWX BSZ;  1O5O AB;  3HWX ASZ;  3N2L CFG;  3N2L ADE;  3N2L ADFG;  1A97 BCD;  3HWX 1AB;  3HWX AS;  3N2L ADEG;  3HWX RZ;  3N2L DGH;  1A97 BD;  3KDP ACD;  3N2L CEF;  3HWX BRZ;  3EYW AB;  3N2L DE;  3HWX 1BS;  1A97 AC;  3N2L CEFG;  3HWX BS;  3N2L ACE;  3HWX 1IJ;  1O5O ACD;  3HWX 1BI;  3KDP ABC;  2BL4 AB;  3N2L AE;  3N2L AEF;  3N2L CDF;  3HWX ABJ;  3N2L DFG;  3HWX IRZ;  3N2L EH;  3HWX BJR;  3N2L BCFG;  3N2L DG;  3N2L BCDG;  3ECA BCD;  3N2L ABDE;  3N2L CDEH;  1W5F AB;  3HWX ABZ;  1A97 AD;  3HWX BJ;  3N2L ABE;  3N2L EF;  3HWX ARZ;  3F7O ABY;  3N2L ACF;  3N2L CDE;  3N2L EGH;  3HWX AJS;  3N2L DEH;  3HWX BIR;  3N2L ADEH;  3N2L BC;  3N2L ABEF;  3HWX AIR;  3F7O AB;  3HWX BRS;  3N2L ABCF;  3HWX 1BZ;  3N2L EFG;  3N2L ADG;  3N2L DFGH;  3N2L ADEF;  3HWX 1RS;  3KDP ACG;  3GVP ACD;  3HWX AR;  3HWX 1IR;  3N2L AB;  1A97 ABC;  3N2L AD;  3HWX IJR;  1O5O BCD;  3HWX 1BJ;  1CQZ AB;  1EK1 AB;  3N2L DEFG;  3HWX AJR;  3N2L AEG;  3DZD AB;  3HWX IRS;  3HWX 1A;  3N2L ACEF;  3N2L ABEG;  1O5O CD;  1O5O BD;  3N2L CDEG;  3KDP CDH;  3HWX 1AZ;  3N2L FGH;  1O5O ABD;  1A97 ACD;  3N2L ABDG;  3N2L BCD;  1CR6 AB;  3N2L ACEH;  3N2L AEH;  3HWX AI;  3N2L DEF;  3HWX 1JS;  3GVP CD;  3N2L AEGH;  3N2L AEFG;  3HWX AJ;  3N2L CEFH;  3HWX IJ;  3F7O ABX;  3N2L CD;  3N2L CDGH;  3N2L ACDE;  3N2L CF;  3HWX 1AJ;  2BI4 AB;  3N2L CDG;  3HWX BIS;  3HWX AJZ;  3N2L ACFG;  3HWX 1RZ;  1O5O BC;  3HWX JRS;  1O5O AD;  3N2L AEFH;  3N2L CDFG;  3N2L ABCE;  3N2L DEFH;  3HWX BIJ;  3HWX JSZ;  3N2L ABCD;  3N2L ADGH;  3F7O BY;  3HWX 1AI;  3HWX ISZ;  3HWX AIJ;  3HWX 1SZ;  3N2L DEG;  3HWX ABR;  3KDP ABG;  3N2L AC;  1O5O AC;  3HWX ARS;  3HWX BJZ;  3HWX 1JZ;  3HWX RSZ;  3N2L BCEF;  3GVP BD;  3N2L CFGH;  3HWX BIZ;  3N2L ACDG;  3N2L EG;  3HWX AIZ;  3N2L ACEG;  1EK2 AB;  3N2L ACDF;  3KDP ABH;  3N2L CDEF;  3GVP BCD;  3HWX 1BR;  3ECA ACD;  3N2L ABC;  3N2L ACD;  1O5O ABC;  3HWX RS;  3HWX IS;  3HWX 1Z;  3N2L DEGH;  3N2L ABEH;  3HWX ABI;  3KDP BCG;  3HWX AZ;  3HWX 1IZ;  3KDP BCH;  3HWX SZ;  3KDP CDG;  3HWX BJS;  3N2L BCF;  3HWX IJS;  3N2L BCDE;