When an Arabidopsis leaf is exposed to bacteria on the leaf surface, or to the MAMP flg22, the stomatal apertures closed by LRR receptor-like kinase FLS2, as well as a heterotrimeric G protein.

TLS Online TPP Program

#Id: 2043

#Unit 8. Inheritance Biology

Sex-limited characteristic, characteristic encoded by autosomal genes and expressed in only one sex.

TLS Online TPP Program

#Id: 9624

#Unit 4. Cell Communication and Cell Signaling

Two Mechanisms Down-Regulate Signaling from RTKs

1. Phosphotyrosine phosphatases

2. Receptor-mediated endocytosis followed by degradation in lysosomes

TLS Online TPP Program

#Id: 2449

#Unit 3. Fundamental Processes

In the absence of both activator and repressor, RNA polymerase occasionally binds the promoter spontaneously and initiates a low level (basal level) of transcription. 

TLS Online TPP Program

#Id: 1486

#Unit 4. Cell Communication and Cell Signaling

When DNA is damaged, p53 is tetramerized and accumulates rapidly.

TLS Online TPP Program

#Id: 1899

#Unit 4. Cell Communication and Cell Signaling

Negative costimulation