Figure 1C: Confocal photomicrographs of individual clones (I-CL) cells immunostained for calponin and SM-1. The clusters of I-CL cells (panel a and b) were clearly immunopositive for the SMC-specific proteins, calponin and SM-1 (panel c and d). Magnification, x 100. Immunostaining of A7r5 smooth muscle cells against the SMC-specific proteins’ antibodies were shown as positive controls (panel e and f).