PR:P20334-1	tumor necrosis factor receptor superfamily member 9 isoform 1 (mouse)	4-1BB|CD137|mTNFRSF9/iso:1		located_in	GO:0009897	external side of plasma membrane			MGI:3807131|PMID:18640726	IDA	NCBITaxon:10090		MGI:1101059	20121217	MGI:MGI	part_of(CL:0000624)|part_of(CL:0000625)