globoside alpha-N-acetylgalactosaminyltransferase; uridine diphosphoacetylgalactosamine-globoside alpha-acetylgalactosaminyltransferase; Forssman synthase; globoside acetylgalactosaminyltransferase; UDP-N-acetyl-D-galactosamine:N-acetyl-D-galactosam • • •