Figure 3. Semaphorin and plexin protein expression in periodontal cells. The expression of Semaphorin 3A, Plexin A1, and Plexin C1 in dermal fibroblasts (DF), gingival fibroblasts (GF), periodontal ligament fibroblasts (PDLF), pre-osteoblasts (OB), and intact periodontal ligament (PDL) was examined by ELISA. Each bar represents the mean and standard deviation for 4 samples each for 4 cell/tissue isolates (n = 16).