Automated description from the Alliance of Genome Resources (Release 3.2)
Exhibits CD4 receptor binding activity; protein phosphatase binding activity; and sialic acid binding activity. Involved in several processes, including negative regulation of calcium-mediated signaling; negative regulation of immunoglobulin secretion; and regulation of B cell proliferation. Localizes to external side of plasma membrane; integral component of plasma membrane; and neuronal cell body membrane. Is expressed in several structures, including alimentary system; brain; genitourinary system; hemolymphoid system gland; and liver and biliary system. Orthologous to human CD22 (CD22 molecule).