FamPlex Protein-ligand interaction ontology Source
http://purl.obolibrary.org/obo/FPLX_PKA http://www.semanticweb.org/ontologies/2010/3/Ontology1271664172453.owl#pKa LOOM
http://purl.obolibrary.org/obo/FPLX_PKI http://www.semanticweb.org/ontologies/2010/3/Ontology1271664172453.owl#pKi LOOM