A “new” HLA‐C specificity, CSH‐2, restricted to Oriental populations

The high frequency of C-locus blank alleles in different races suggests the existence of an undetected antigen. We have identified a new C-locus antigen, tentatively named CSH-2, which is present in Oriental populations, but is apparently not present in Caucasoid, or Black populations. This new specificity was defined by a single wong monospecific antiserum, named ZHA114, which was obtained by planned immunization.