. "Edited: Orlic-Milacic, M, 2012-02-10"^^ . "Authored: Jassal, B, 2004-12-15 13:08:03"^^ . "Reviewed: Joutel, A, 2004-12-15"^^ . "Similar to NOTCH1, NOTCH3 is activated by delta-like and jagged ligands (DLL/JAG) expressed in trans on a neighboring cell. The activation triggers cleavage of NOTCH3, first by ADAM10 at the S2 cleavage site, then by gamma-secretase at the S3 cleavage site, resulting in the release of the intracellular domain of NOTCH3, NICD3, into the cytosol. NICD3 subsequently traffics to the nucleus where it acts as a transcriptional regulator."^^ . . . . . . "Signaling by NOTCH3"^^ . . . . . . . .