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After a protein is purified, what is the next step in determining the structure of a protein by x-ray crystallography?
Pre-T Cells
Immature T cells that are in the process of developing their specificity and functionality in the thymus.
Pre-B Cells
Immature B cells undergoing maturation in the bone marrow, important for the adaptive immune system.
Negative Selection
A process in immunology where self-reactive T or B cells are eliminated during development, preventing autoimmune diseases.
Positive Selection
A process in the immune system whereby cells that recognize a foreign antigen with high affinity are selectively proliferated.
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