Studies have proven that Syndecan-4 protein is a cell surface proteoglycan that cooperates with SDCBP and PDCD6IP to play a key role in regulating exosome biogenesis. Syndecan-4 functions as a homodimer and interacts with various intracellular partners through its cytoplasmic domain. Syndecan-4 Protein, Human is the recombinant human-derived Syndecan-4 protein, expressed by E. coli , with tag free.