RhoJ stabilizes vessels in neonatal retinal vasculature. (A-H) Whole-mount IHC of P5 retinas with the indicated Abs. RhoJ KO mice showed delayed radial growth and increased empty sleeves (Col IV(+) iB4(−); arrowheads in F,H). (I-L) Quantification of each parameter (n = 4). Scale bars: 500 μm (A-B) and 50 μm (C-H).