Northern blot analysis of β-1,4-GalT II and β-1,4-GalT I transcripts in human tissues. Commercially available mRNA blots containing 2 μg of poly(A)+ RNA/lane were probed with 32P-labeled β-1,4-GalT II cDNA, human β-1,4-GalT I cDNA, or β-actin cDNA. The sizes of RNA markers are indicated in kilobases (kb).