| GO term | GO name | GO namespace | GO def |
| GO:0005515 | protein binding | molecular_function | Binding to a protein. [GOC:go_curators] |
| GO:0042802 | identical protein binding | molecular_function | Binding to an identical protein or proteins. [GOC:jl] |
| GO:0046982 | protein heterodimerization activity | molecular_function | Binding to a nonidentical protein to form a heterodimer. [GOC:ai] |
| GO:0006957 | complement activation, alternative pathway | biological_process | Any process involved in the activation of any of the steps of the alternative pathway of the complement cascade which allows for the direct killing of microbes and the regulation of other immune processes. [GOC:add, ISBN:0781735149] |
| GO:0032091 | negative regulation of protein binding | biological_process | Any process that stops, prevents, or reduces the frequency, rate or extent of protein binding. [GOC:mah] |
| GO:0051838 | cytolysis by host of symbiont cells | biological_process | The killing by an organism of a cell in its symbiont organism by means of the rupture of cell membranes and the loss of cytoplasm. The symbiont is defined as the smaller of the organisms involved in a symbiotic interaction. [GOC:add] |
| 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:0032991 | protein-containing complex | cellular_component | A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together. [GOC:dos, GOC:mah] |
| GO:0006956 | complement activation | biological_process | Any process involved in the activation of any of the steps of the complement cascade, which allows for the direct killing of microbes, the disposal of immune complexes, and the regulation of other immune processes; the initial steps of complement activation involve one of three pathways, the classical pathway, the alternative pathway, and the lectin pathway, all of which lead to the terminal complement pathway. [GO_REF:0000022, GOC:add, ISBN:0781735149] |
| GO:0005615 | extracellular space | cellular_component | That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid. [ISBN:0198547684] |
| GO:0001851 | complement component C3b binding | molecular_function | Binding to a C3b product of the complement cascade. [GOC:add, ISBN:0781735149] |