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The mononuclear phagocyte system constitutes macrophage cells spread throughout the human body. The macrophages are long-lived cells that provide a major defense system against hostile elements through phagocytosis and subsequent intracellular destruction of the particle or cell.
Abstract. Monoclonal antibodies are protein molecules made in the laboratory from hybridoma cells (stable cell lines derived by fusing antibodyâproducing cells from immunised animals with cells that confer immortality and highâyield antibody production) or by recombinant deoxyribonucleic acid (DNA) technology.bstract. Monoclonal antibodies are protein molecules made in the laboratory from hybridoma cells (stable cell lines derived by fusing antibodyâproducing cells from immunised animals with cells that confer immortality and highâyield antibody production) or by recombinant deoxyribonucleic acid (DNA) technology.