AbstractWe have studied the species and tissue expression of the 68kD sulfogalactolipid binding protein SLIP 1, originally detected in the male germ cells of the rat (Lingwood:Can. J. Biochem. Cell Biol., 63:1077–1085, 1985). OUr results show that SLIP 1 has been highly conserved during evolution and is found in the testes of all vertebrates tested. In studies in the rat, we have found that SLIP 1 is, however, tissue restricted, being found only in the brain (also a major site of sulfogalactolipid biosynthesis) in addition to the testis. SLIP 1 was also detected in mammalian oocytes. The SLIP 1 species detected in brain and oocytes retain the sulfogalactolipid‐binding characteristics of rat testicular SLIP 1, indicating that, in addition to immunological features, the glycolipid‐binding function of SLIP 1 is conserved in these ti
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