| GO term | GO name | GO namespace | GO def |
| GO:0006958 | complement activation, classical pathway | biological_process | Any process involved in the activation of any of the steps of the classical pathway of the complement cascade which allows for the direct killing of microbes, the disposal of immune complexes, and the regulation of other immune processes. [GOC:add, ISBN:0781735149] |
| GO:0030449 | regulation of complement activation | biological_process | Any process that modulates the frequency, rate or extent of complement activation. [GOC:go_curators] |
| GO:0045087 | innate immune response | biological_process | Innate immune responses are defense responses mediated by germline encoded components that directly recognize components of potential pathogens. [GO_REF:0000022, GOC:add, GOC:ebc, GOC:mtg_sensu] |
| GO:0005576 | extracellular region | cellular_component | The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite. [GOC:go_curators] |
| GO:0016020 | membrane | cellular_component | A lipid bilayer along with all the proteins and protein complexes embedded in it and attached to it. [GOC:dos, GOC:mah, ISBN:0815316194] |
| GO:0045957 | negative regulation of complement activation, alternative pathway | biological_process | Any process that stops, prevents, or reduces the frequency, rate or extent of complement activation by the alternative pathway. [GOC:go_curators] |
| GO:0045959 | negative regulation of complement activation, classical pathway | biological_process | Any process that stops, prevents, or reduces the frequency, rate or extent of complement activation by the classical pathway. [GOC:go_curators] |