Figure 2.

Intracellular expression of immunogenic citrullinated 47 kDa protein. Presence of citrullinated 47 kDa protein reactive with rheumatoid arthritis serum 1 in different subcellular fractions of undifferentiated HL60s (U) and HL60 monocytes (M) (S100, cytosolic; P100, membrane; Nuc, nuclear) showing enrichment in the S100 (cytosolic) fraction.