Her1 signaling is triggered by her1 monomers each binding its ligand followed by homodimerization and autophosphorylation. How do her2/her3 heterodimers initiate signaling?.

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium