#pdbid|chain|is S/K-not|(slip)knot types; 5xq0;A;S;-3.1 5u8r;A;S;-3.1 5u8r;A;S;-3.1 6f3a;Y;S;-3.1 6f3a;Y;S;-3.1 6f3a;Y;S;-3.1 6f3a;Y;S;-3.1 5bt1;A;S;-3.1