Encyclopedia of Signaling Molecules

2018 Edition
| Editors: Sangdun Choi

B Lymphocyte Antigen CD19

  • Rashmi Kumar
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-67199-4_101837

Synonyms

Historical Background

CD19 was first identified as biomarker of normal and neoplastic B lymphocytes as B4 antigen with the use of anti-B4 monoclonal antibody against CD19 (Anderson et al. 1984). Anti-B4 antibody in turn was encoded from cDNA clones of human tonsillar cDNA library, by selectively hybridizing with RNA from CD19+ cell lines. Both human and mouse CD19 molecules are highly homologous with a conserved cytoplasmic domain with no homology with other known proteins and an immunoglobulin-like extracellular domain, which gave CD19 molecule the status of a member of Ig superfamily (Tedder and Isaacs 1989).

Introduction

The CD19 molecule is a 95 KDa cell surface protein of B lymphocytes and follicular dendritic cells (FDC). It is considered as a biomarker of B cell because of its continued expression throughout B cell differentiation stages starting from late pro-B cell stage until terminally differentiated plasma cells (Nadler et al. 1983;...

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Nanomaterial Therapeutics and Toxicology GroupCSIR-Indian Institute of Toxicology Research (CSIR-IITR)LucknowIndia