Human colony stimulating factor 1 receptor (CSF1R), also known as FMS and CD115, GenBank Accession No. NM_005211, a.a. 20-512, with C-terminal Avi-Tag fused to the Fc portion of Human IgG1 and expressed in a HEK293 cell expression system. This protein is enzymatically biotinylated using AviTag™ technology. MW=83 kDa.