#pdbid|chain|deposition date|is S/K-not|(slip)knot types; 6npl|A|2019-09-06|S|4.1 +3.1 +3.1 +3.1; 6nph|A|2019-09-06|S|4.1 +3.1 +3.1 +3.1; 6npk|A|2019-09-06|S|4.1 +3.1 +3.1 +3.1;