CCL27, also named IL-11 R-alpha-locus chemokine (ILC), skinkine, eskine and cutaneous T-cell-attracting chemokine (CTACK), is a small cytokine belonging to the CC chemokine family. CCL27 is expressed in numerous tissues, including gonads, thymus, placenta and skin and it elicits its chemotactic effects by binding to the chemokine receptor CCR10. CCL27 can attract skin-associated memory T-lymphocytes. Studies showed it may play a role in mediating homing of lymphocytes to cutaneous sites and cell migration during embryogenesis. Mature mouse CCL27 is a 95 amino acid (a.a.) protein that shares 57 % a.a. and 87 % a.a. sequence identity with human and rat CCL27, respectively. It shares 18 %~31 % a.a. sequence identity with other mouse CC chemokines.