Receptor for chemokine SCYA25/TECK. Subsequently transduces a signal by increasing the intracellular calcium ions level. (Microbial infection) Alternative coreceptor with CD4 for HIV-1 infection. Highly expressed in the thymus and low in lymph nodes and spleen. EC50 of SCYA25/TECK for isoform 1 is lower than for isoform 2. Belongs to the G-protein coupled receptor 1 family. Extended N-terminus. CC chemokine receptors entry