Cell Cycle Checkpoints: G1, G2 and Spindle Control
Skin can replace many damaged cells through division, whereas most mature neurons remain outside the division cycle. These cell types share essentially the same inherited genome but express different proteins and respond differently to growth signals. Cell specialization includes regulation of wheth
Signal Transduction Cascades: Amplification and Control
A frightened animal can mobilize fuel rapidly after an endocrine signal. A small number of activated receptors can change the activity of many downstream molecules. That multiplication is signal amplification.
