Branching enzyme that converts linear into branched poly-N-acetyllactosaminoglycans. Introduces the blood group I antigen during embryonic development. It is closely associated with the development and maturation of erythroid cells.
Determines the expression of the blood group I antigen in erythrocytes.
Subcellular locations: Golgi apparatus membrane
Expressed in lens epithelium cells.
Expressed in reticulocytes.