TGFB2 and glaucoma: Although the proportion of intrinsically active to total TGF-β2 in the AH of cats with glaucoma (mean = 4.2 ± 1.1%) was significantly higher than in normal control cats (mean = 3.2 ± 0.8%, Welch's t-test, P = 0.029), this difference was only modest, with the vast majority of AH TGF-β2 in both groups present in latent form (Fig. 2C).