<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The first Japanese En(a–) individual (T.N.) was found by screening red cells from 250,000 Japanese blood donors with monoclonal anti-En<sup>a</sup>. His serum contained no atypical antibodies and his partial red cell phenotype was M–N–S+s–, although a trypsinresistant N antigen was detected. His red cells were En(a–) and Wr(b–), as determined by various human and mouse monoclonal antibodies. The absence of glycophorin A (GPA) and the presence of apparently normal glycophorin B (GPB) were demonstrated by immunoblotting with antibodies to the extracellular and cytoplasmic domain of GPA and to epitopes common to GPA and GPB. Sialic acid levels of T.N.’s intact red cells were substantially lower than those of control MN cells. Serologic tests suggested that both of T.N.’s parents were heterozygous for a recessive GPA deficiency gene. <bold><italic>Immunohematology</italic></bold> 1993;9:105.</p></abstract>

The first Japanese En(a–) individual (T.N.) was found by screening red cells from 250,000 Japanese blood donors with monoclonal anti-Ena. His serum contained no atypical antibodies and his partial red cell phenotype was M–N–S+s–, although a trypsinresistant N antigen was detected. His red cells were En(a–) and Wr(b–), as determined by various human and mouse monoclonal antibodies. The absence of glycophorin A (GPA) and the presence of apparently normal glycophorin B (GPB) were demonstrated by immunoblotting with antibodies to the extracellular and cytoplasmic domain of GPA and to epitopes common to GPA and GPB. Sialic acid levels of T.N.’s intact red cells were substantially lower than those of control MN cells. Serologic tests suggested that both of T.N.’s parents were heterozygous for a recessive GPA deficiency gene. Immunohematology 1993;9:105.

En(a–) phenotype in a Japanese blood donor

Immunohematology

{"article-title":"En(a\u2013) phenotype in a Japanese blood donor"}

The first Japanese En(a–) individual (T.N.) was found by screening red cells from 250,000 Japanese blood donors with monoclonal anti-Ena. His serum contained...

En(a–) phenotype in a Japanese blood donor

Published Online: Jun 12, 2020

Page range: 105 - 108

DOI: https://doi.org/10.21307/immunohematology-2019-969

© 1993 Y. OKUBO, et al., published by Sciendo