CD79A and Schnyder corneal dystrophy: Additionally, IgA immunoreactivity in the cytoplasm of epithelial cells was widely detected in 20-week-old SCD-fed mice compared to 12-week-old SCD-fed mice (Figure 3g), and many IgA-immunopositive cells were also observed from the bottom to top of LP in intestinal villi (Figure 3f, arrows in 3h).