Expression of TAAR1 on lymphocytes is associated with activation of lymphocyte immuno-characteristics. The peripheral lymphoid organs are the sites of lymphocyte activation by antigens. A high lymphocyte count with a low neutrophil count might be caused by lymphoma. In the mid-1960s, studies reported "activities" in leukocyte-conditioned media that promoted lymphocyte proliferation. There are two major kinds of lymphocytes - the T lymphocyte and the B lymphocyte. Adverse effects included inflammatory infiltrates, alveolar collapse, subpleural thickening, and lymphocyte proliferation. The enzyme is used as a marker of lymphocyte differentiation. Normally, flow cytometry testing is used for specific lymphocyte population counts. A lymphoblast is a modified naive lymphocyte with altered cell morphology. He explained immunological memory as the cloning of two types of lymphocyte. Its association with a blood cell (lymphocyte) cancer called Burkitt's lymphoma is established. Vinyl chloride is a mutagen having clastogenic effects which affect lymphocyte chromosomal structure. MiR-155 is crucial for proper lymphocyte development and maturation. CD135 is important for lymphocyte (B cell and T cell) development. Gut specific homing is the most understood of lymphocyte homing.