L-threonyl-[protein] + N-acetyl-D-glucosamine => 3-O-(N-acetyl-beta-D-glucosaminyl)-L-threonyl-[protein] + H2O
l-threonyl-[protein] + n-acetyl-d-glucosamine => 3-o-(n-acetyl-beta-d-glucosaminyl)-l-threonyl-[protein] + h2o
L-threonyl-[protein] + N-acetyl-D-glucosamine => 3-O-(N-acetyl-beta-D-glucosaminyl)-L-threonyl-[protein] + H2O
l-threonyl-[protein] + n-acetyl-d-glucosamine => 3-o-(n-acetyl-beta-d-glucosaminyl)-l-threonyl-[protein] + h2o