The specific antibody to inhibit the action of α-N-acetylgalactosaminyltransferase (A-enzyme) was demonstrated in an immune serum produced by injecting human urinary A-enzyme preparation into a blood group O' rabbit.
Isoelectric focusing technique reveals a set of three bands which is present in normal urine samples from young men and women of 0-17 years of age. The set of bands contains glycoproteins and is named as Ugl-Y.