The product contains the polyhedrin protein co-crystalized with Human MCP-1. MCP-1, also known as CCL2, is a member of the CC or beta chemokine family that is best known as a chemotactic agent for mononuclear cells, such as monocytes and basophils, but not for neutrophils or eosinophils. Monocyte Chemotactic Protein 1 (MCP-1) is produced by injured or infected tissues. MCP-1 signals through the CCR2 and CCR4 G protein-coupled receptors to recruit memory T cells, monocytes, and dendritic cells to sites of inflammation.