Mouse skin from transgenic mice shows prominent
expression of a protein called Fyn (brown color, left). Levels of
Fyn drop dramatically in Fyn/Srcasm mice, which has increased levels
of the protein Srcasm (center). Fyn levels remain prominent in Fyn/Srcasm-P
mice, which express an inactive form of Srcasm (right).
Image Credit: Weijie Li, MD, PhD, University of Pennsylvania
School of Medicine