Fig. 4.

(a)–(c) $\alpha$-SMA in the processes of a pericyte on the third-order retinal vessel runs around the vascular axis (white-dashed lines), whereas non-$\alpha$-SMA isoforms of actin can be traced along the longitudinal axis of the vessel (cyan-dashed lines). It is noteworthy that the absence of $\alpha$-SMA immunostaining of the phalloidin-positive longitudinal filaments in contrast to circular ones in inset. Scale bar: $10\mu \mathrm{m}$. Adapted from Kureli et al.,²⁵ with permission.