303 | James P. Allison on Fighting Cancer with the Immune System

458.194 - 485.757 James P. Allison

If you know like RAS is a molecule that really is involved in a pathway that takes signals outside a cell, like wounding or something, and it tells the cell, oh, you better divide because we need to cover up that scrape or fix that cut or whatever. But if something happens and that pathway gets locked on, you know, so the doorbell's ringing all the time, you know, the cells just keep dividing.