There are 3 SPARC protein produced in house with high quality which are covering various species. Among these SPARC proteins, there are 1 Human SPARC protein, 1 Mouse SPARC protein, 1 Rat SPARC protein. All these SPARC protein are expressed by different host cells. 3 SPARC proteins are expressed by HEK293 Cells . These SPARC proteins are produced with different tags, such as His Tag.