Fc receptor-like protein 1 (Fcrl1) is a cell-surface membrane protein that belongs to FCRL family. Fcrl1 is a BCR co-receptor and enhance signaling through the B cell receptor. Fcrl1 promotes B cell proliferation and calcium mobilization. Fcrl1 is a biomarker and an important target in B cell lymphoproliferative disorders[1][2][3]. FCRL1 Protein, Mouse (203a.a, HEK293, His) is the recombinant mouse-derived FCRL1 protein, expressed by HEK293 , with C-6*His labeled tag.