obsolete catabolism by symbiont of host protein https://github.com/geneontology/go-ontology/issues/21469 true catabolism by organism of host protein OBSOLETE. The chemical reactions and pathways performed by an organism resulting in the breakdown of protein macromolecules within the host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction. biological_process GO:0052014 This term was obsoleted because it represents a molecular function.