Mason trichrome staining of gastrocnemius, diaphragm, and heart muscle. Thin sections of gastrocnemius muscle (A), diaphragm (B), or heart (C) from 5-month-old wild-type (WT), Galgt2−/−, mdx, and Galgt2−/−mdx mice were stained with a modified Mason trichrome stain. Scale bar = 100 μm.