Twin and Siamois encode homeodomain transcription factors and are expressed in the organizer

TLS Online TPP Program

#Id: 10231

#Unit 6. System Physiology – Plant

BIN2 is a serine/threonine protein kinase that, in the absence of brassinolide, negatively regulates the closely related transcription factors BES1 and BZR1 by phosphorylation.

TLS Online TPP Program

#Id: 8704

#Unit 1. Molecules and their Interaction Relevant to Biology

TLS Online TPP Program

#Id: 7044

#Unit 11. Evolution and Behavior

Orthogenesis - “Straight-line evolution,” held that the variation that arises is directed toward fixed goals.

TLS Online TPP Program

#Id: 6398

#Unit 2. Cellular Organization

Repression-Trp aporepressor dimer binds high tryptophan, changes conformation with high affinity for trp operator

Tryptophan is a corepressor

TLS Online TPP Program

#Id: 9066

#Unit 4. Cell Communication and Cell Signaling

In nucleus PKA phosphorylate serine-133 on a transcription factor called CREbinding (CREB) protein