Human secreted CD24, also known as Signal Transducer CD24, Small Cell Lung Carcinoma Cluster 4 Antigen and CD24A, GenBank Accession No. NM_013230, a.a. 27-59(end), fused at the C-terminus of the Fc portion of human IgG1, with C-terminal Avi-tag, expressed in a HEK293 cell expression system and enzymatically biotin-labeled using Avi-tag™ technology. Biotinylation is confirmed to be ≥90%. MW = 32 kDa. This protein runs at a higher MW by SDS-PAGE due to glycosylation.