Description: RANTES (Regulated on Activation, Normal T Expressed and Secreted) is an 8kD member of the C-C family of chemkines (CCL5). It is a proinflammatory chemoattractant for several cell types including CD4+ T cells, monocytes and eosinophils. In contrast to other members of the chemokine superfamily, RANTES has been observed to be downregulated upon activation in T cells. In other secreting cells, upregulation is observed in response to activation.