“…The R-antigen of sheep (Schmid & Cwik, 1975), and the J-antigen of cattle (Eyquem et al, 1956;Hruban & Simon, 1973;Rensmeyer, 1977) were reported to hold an exceptional position, being present on erythrocytes as well as on lymphocytes, as proved by the direct cytotoxic test and absorption studies.…”