AC133 Hematopoietic Stem Cell Antigen: Human Homologue of Mouse Kidney Prominin or Distinct Member of a Novel Protein Family?

To the Editor: In the December 15, 1997 issue of BLOOD, Miraglia et al[1][1]reported the sequence of the AC133 antigen, a novel 865 amino acid–residue surface glycoprotein found in human hematopoietic stem and progenitor cells. In the November 11, 1997 issue of Proceedings of the National Academy