Fusion protein amino acids 42-361 (extracellular N-terminus) of rat NR1(also known as N-methyl-D-aspartate receptor subunit NR1, NMDAR1, NMD-R1, GRIN1, Glutamate receptor subunit zeta-1 and Glurz1, accession number P35439)
Mouse: 99% identity (319/320 amino acids identical)Human: 99% identity (317/320 amino acids identical)<50% identity with other Glutamate receptors