where does positive selection of t cells occur
T cell About 98% of thymocytes die during the development processes in the thymus by failing either positive selection or negative selection, whereas the other 2% survive and leave the thymus to become mature immunocompetent T cells. Increasing evidence indicates microRNAs, which are small noncoding regulatory RNAs, could impact the clonal selection process during thymic development. For example, miR-181a was found to play a role in the positive selection of T lymphocytes.[31]
Gilbert Gottfried In March 2011, Gottfried made a series of jokes on his Twitter account about the
Rate equation k is the first order rate constant, which has units of 1/s or sâˆ’1.
Corona Spectroscopy measurements indicate strong ionization and plasma temperature in excess of 1,000,000 kelvins,[1] much hotter than the surface of the Sun.