A Hair cycle domain needs
Initiation, spread, and stop signals
Refractory telogen
telogen regions on
which
anagen wave can not pass
Competent telogen
telogen regions on
which anagen wave can
propagate
Plikus, .. & Chuong. 2008. Cyclic dermal BMP signaling
regulates stem cell activation during hair regeneration. Nature. 451:340-344.