Anti-collagen type XIX alpha 1 antibodies are used in antigen-specific immunodetection in biological samples. The target collagen type XIX alpha 1 is a known alias name of the protein collagen type XIX alpha 1 chain, encoded by the COL19A1 gene in humans. This 1142-amino acid residue protein is believed to act as a cross-bridge between fibrils and other extracellular matrix molecules. It is localized to the extracellular matrix and is secreted of the cell. Other synonyms for collagen type XIX alpha 1 include COL9A1L, D6S228E, and collagen alpha-1(XIX) chain.