abundance mRNAthe amount of a specific mRNA in a CELL. mRNA of some GENES is produced in higher quantities than mRNA of other genes, depending upon how often the .gene is expressed. Cells from a particular TISSUE type or at different stages of DEVELOPMENT will have varying amounts of specific mRNA. Three abundance classes are identified in typical EUKARYOTE cells: high, medium and low abundance. See GENE EXPRESSION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005