Figure 7.
Mouse lenses lacking Tmod1 have decreased levels of a short γTM, whereas global actin levels are unchanged. (A) Western blots of Tmod1, actin, γTM, and GAPDH in cortical fiber cell extracts from 2-mo-old mice. Each lane is 1/4 of a lens cortex from a different animal. (B) Quantification from blots in A, normalized to GAPDH. γTM is reduced ∼3-fold (P < 0.002), but actin is unchanged (P < 0.96). n = 4 animals per genotype. (C) Western blots of Tmod1, actin, and γTM in total cortical fiber cell extracts (T), cytosol (C), and membranes (M) from 4-mo-old mice. Each lane is 1/10 of a lens cortex. (D) Percentage of membrane-associated Tmod1, actin, or γTM. Percentage of γTM on membranes is ∼60% in Tmod1+/+Tg+ and ∼30% in Tmod1−/−Tg+ lenses (P < 0.008). Actin levels on membranes are unchanged (P < 0.2). n = 3 experiments.