"Interacting selectively with magnesium (Mg) ions [goid 287] [evidence IEA]; Combining with an extracellular or intracellular messenger to initiate a change in cell activity [goid 4872] [evidence IEA];  [goid 4972] [evidence ISS];  [goid 4972] [pmid 17502428] [evidence IDA]; Catalysis of facilitated diffusion of an ion (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism [goid 5216] [evidence IEA]; Catalysis of the transmembrane transfer of an ion by a channel that opens when extracellular glutamate has been bound by the channel complex or one of its constituent parts [goid 5234] [evidence IEA]; Catalysis of facilitated diffusion of a calcium (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism [goid 5262] [evidence IEA]; Interacting selectively with calcium ions (Ca2+) [goid 5509] [evidence IEA]; Interacting selectively with glycine, aminoethanoic acid [goid 16594] [pmid 17320117] [evidence IDA]; Interacting selectively with an identical protein or proteins [goid 42802] [pmid 17997397] [evidence IPI]; Interacting selectively with the enzyme protein phosphatase 2A [goid 51721] [evidence ISS]; Combining with an extracellular or intracellular messenger to initiate a change in cell activity [goid 4872] [evidence IEA];  [goid 4972] [evidence IEA]; Catalysis of facilitated diffusion of an ion (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism [goid 5216] [evidence IEA]; Catalysis of the transmembrane transfer of an ion by a channel that opens when extracellular glutamate has been bound by the channel complex or one of its constituent parts [goid 5234] [evidence IEA]; Catalysis of facilitated diffusion of a calcium (by an energy-independent process) involving passage through a transmembrane aqueous pore or channel without evidence for a carrier-mediated mechanism [goid 5262] [evidence IEA]; Interacting selectively with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules) [goid 5515] [evidence IEA]"