go_id,ontology,go_term,term_definition,evidence
GO:0005509,MF,"calcium ion binding","Interacting selectively and non-covalently with calcium ions (Ca2+).",IDA
GO:0005576,CC,"extracellular region","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.",IEA