Figure 3
From: The stressed synovium
Expression of phosphorylated p38 protein kinase and ERK protein kinase in synovial microvessels. Immunohistochemistry of synovial microvessels of patients with RA show the expression of phosphorylated p38 protein kinase in synovial endothelial cells (a). In contrast, the phosphorylated ERK protein kinase (b) is not expressed by synovial endothelial cells but by cells surrounding the synovial microvessel.