A cell surface receptor for INSULIN. It is comprised of a tetramer of two alpha and two beta subunits which are derived from cleavage of a single precusor protein. The receptor contains an intrinsic tyrosine kinase domain that is located within the beta subunit. Activation of the receptor by INSULIN results in numerous metabolic changes including increased uptake of GLUCOSE into the LIVER; MUSCLE; and ADIPOSE TISSUE.
