Fig. 4From: Prokineticin 2 antagonist, PKRA7 suppresses arthritis in mice with collagen-induced arthritisImmunostaining of PKR1 and PKR2 proteins in synovial tissue. Brown staining indicates PKR1- or PKR2-positive cells. a Neutrophils infiltrating in the synovium membrane of CIA mice were positive for PKR1 (400×). b PKR2-positive cells were macrophage-like cells (400×)Back to article page