Figure 4.

Messenger RNA and protein content of AChR subunits change in posterior cricoarytenoid muscles with age. (A) Transcript levels for AChR subunits were normalized to 6 months as the baseline. Results are fold changes of the corresponding AChR subunit. “*” indicates significantly different from 6 months. (B) AChR, protein content decreased at 30 months (left), whereas AChRϵ increased at 30 months (right). “*” indicates statistical significance from 6 months. Inset shows representative western blots for both subunits at the three ages. AChR = acetylcholine receptor.