Figure 1From: Citrullination, a possible functional link between susceptibility genes and rheumatoid arthritisSummary of the four exonal single nucleotide polymorphisms (SNPs) in PADI4. The actual SNP is indicated in bold. The amino acid that shows most conservation with other known peptidylarginine deiminases [4] is shaded gray. SNP ID* according to Suzuki and colleagues as padi4_x [7].Back to article page