Examples of immunohistochemically stained proteins in sun-protected skin after 2–3 MED of SSL-irradiation. Phospho-p38 (Threonine 180/Tyrosine 182) expression at baseline (a), 1 hour (b), 5 hours (c), and 24 hours (d). Phospho-ERK 1/2 (Threonine 202/Tyrosine 204) expression at baseline (e), 1 hour (f), 5 hours (g), and 24 hours (h). Phospho-histone H3 (Serine 10) expression at baseline (i), 1 hour (j), 5 hours (k), and 24 hours (l). Images are at a magnification of 400X and the scale bar represents 50 μm. Red (phospho-ERK 1/2 and phospho-histone H3) or brown (phospho-p38) nuclear and cytoplasmic stains represent positive and blue stain represents negative staining.