physical interaction true Interaction among molecules that can be direct or indirect. OBSOLETE: splitted to 'association' MI:0914 and 'physical association' MI:0915. For remapping consider the experimental setting of an interaction. For bulk remapping a possible criteria is to whatever physical interaction that has among its participant a bait should become 'association' MI:0914 the others can become 'physical association' MI:0915. Two hybrid interactions are an expection and can be 'physical association' MI:0915. PSI-MI MI:0218