Differential manifestation of ocular phenotypes in TALEN‐mediated p19 knockout FVB/N and C57BL/6J mouse lines Jin‐Sung Park1 · Joo‐Il Kim1,2 · Hyun‐Jin Lim1,2 · Soo‐Kyung Ryu1 · Euna Kwon1 · Kang‐Min Han2,3 · Ki‐Taek Nam4 ·