Identification of Bakb, a new platelet-specific antigen associated with posttransfusion purpura

T. S. Kickler, J. H. Herman, K. Furihata, T. J. Kunicki, R. H. Aster

Research output: Contribution to journalArticlepeer-review


Baka is a platelet alloantigen whose putative allele, Bakb, has not been identified previously. By using a serum, 'Har', obtained from a patient with posttransfusion purpura, we describe the platelet alloantigen Bakb. The Har serum reacted with an NP-40-extractable platelet membrane protein of 142 kd with mobility similar to platelet glycoprotein IIbα. We found that the antigen recognized by the Har serum is inherited in an autosomal dominant mode with an apparent gene frequency of .39. Chi-square analysis of observed and expected phenotype frequencies indicated that serum Har recognizes Bakb, the anticipated allele of Baka. Our findings provide new evidence for polymorphism of glycoprotein IIb and for the association of posttransfusion purpura with alloimmunization to determinants on this glycoprotein.

Original languageEnglish (US)
Pages (from-to)894-898
Number of pages5
Issue number4
StatePublished - 1988

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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