What does gene A do? What does gene B do? What does it do in different contexts? What's its importance? We know the answer to that for a very small number of genes, the ones that made themselves evident many years ago.
David BaltimoreWhen we talk about stem cells, we are actually talking about a complicated series of things, including adult stem cells which are largely cells devoted to replacing individual tissues like blood elements or liver or even the brain.
David Baltimore