Histology of connective tissue in tails. Hematoxylin/chromotrope stained sections of tails from wild type (A-C), heterozygous (D-F), and fibromodulin-null (G-I) littermates. A, B, D, E, G, and H, transverse sections. C, F, and I, longitudinal sections. Dermis (d), muscle (m), and tendon (t) are indicated. Photomicrographs A, D, and G show an overview (magnification, 31). Micrographs B, C, E, F, H, and I show tendon bundles at higher magnifications (78). Arrows indicate abnormal fiber bundle in heterozygous tail. Source publication