Stathopoulos, Angelike, and Michael Levine. (2002) 2002. “Linear Signaling in the Toll-Dorsal Pathway of Drosophila: Activated Pelle Kinase Specifies All Threshold Outputs of Gene Expression While the BHLH Protein Twist Specifies a Subset.”. Development 129 (14): 3411-9. Reference Link
Armand, P, A C Knapp, A J Hirsch, E F Wieschaus, and M D Cole. (1994) 1994. “A Novel Basic Helix-Loop-Helix Protein Is Expressed in Muscle Attachment Sites of the Drosophila Epidermis.”. Mol Cell Biol 14 (6): 4145-54. Reference Link