B-Lymphocyte Antigen CD19

**Semantic type:** Amino Acid, Peptide, or Protein|Immunologic Factor

**Definition:** B-lymphocyte antigen CD19 (556 aa, ~61 kDa) is encoded by the human CD19 gene. This protein is involved in enhancing B-cell receptor-dependent signaling.

**Synonyms:** - B-Lymphocyte Surface Antigen B4 - B4 - CD19 - CD19 - CD19 - CD19 Antigen - Differentiation Antigen CD19 - Leu-12 - T-Cell Surface Antigen Leu-12