Human Lymphocytes Interact Directly with CD47 through a Novel Member of the Signal Regulatory Protein (SIRP) Family

Abstract excerpt

Two closely related proteins, signal regulatory protein alpha (SIRPalpha; SHPS-1/CD172) and SIRPbeta, have been described in humans. The existence of a third SIRP protein has been suggested by cDNA sequence only. We show that this third SIRP is a separate gene that is expressed as a protein with unique characteristics from both alpha and beta genes and suggest that this gene should be termed SIRPgamma. We have...

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