Serological Cross‐reactivity in the HL‐A System

Abstract
New cross‐reactions between allelic antigens of the HL‐A system have been identified by examining new and well characterized HL‐A alloantisera. Sixteen “monospecific” and 25 “duospecific” antisera were absorbed with various known platelets and examined for inhibition of cytotoxicity to lymphocytes from different individuals. Up‐to‐date diagrammatic representations of the most frequently observed cross‐reactivities are given.