The 1D3 antibody reacts with mouse CD19, a 95 kDa glycoprotein which acts as a co-receptor, along with CD21 and CD81, in support of the functional B cell receptor (BCR). This complex provides antigen-specific recognition and subsequent activation of B cells to proliferate and differentiate into antibody-secreting cells (plasma cells) or memory B cells, which are crucial for secondary antigen encounter. CD19 is a lineage-differentiation marker, as its expression is detectable at the earliest B cell stages, through development, and is finally lost upon transition to mature plasma cells. The 1D3 antibody is widely used as a phenotypic marker for CD19 expression on B cells, as well as on dendritic cell subsets.

Recent Publications:

Weber A, Pawar HN, Klein JR. Thyroid stimulating hormone β-subunit splice variant is expressed in all fractional subsets of bone marrow hematopoietic cells and peripheral blood leukocytes and is modulated during bacterial infection. Gen Comp Endocrinol. 2020 Apr 30:113495. doi: 10.1016/j.ygcen.2020.113495

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Qiumei Du, Ashley R. Hoover, Igor Dozmorov, Ondine B. Cleaver,Joshua T. Mendell, Nicolai S.C. van Oers. MIR205HG Is a Long Noncoding RNA that Regulates Growth Hormone and Prolactin Production in the Anterior Pituitary. Dev Cell. 2019 May 20;49(4):618-631.e5. doi: 10.1016/j.devcel.2019.03.012

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Ortega SB, Noorbhai I, Poinsatte K, Kong X, Anderson A, Monson NL and Stowe AM. 2015. Discov Med. 19(106): 381-392. (Flow Cytometry)

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