3 ms·
They are made by https://en.wikipedia.org/wiki/Thymic_epithelial_cell https://en.wikipedia.org/wiki/Thymic_epithelial_cell (see the section on Positive and nega
by nicwilson 6y ago
They are made by https://en.wikipedia.org/wiki/Thymic_epithelial_cell https://en.wikipedia.org/wiki/Thymic_epithelial_cell (see the section on Positive and negative selection) as part of the selection process.