In actively respiring mitochondria, 0.1% to as much as 4% of the O2 used in respiration forms •O2^2- — more than enough to have lethal effects unless the free radical is quickly disposed of.

TLS Online TPP Program

#Id: 1772

#Unit 4. Cell Communication and Cell Signaling

CTLA-4 bind to CD80/86 and inhibits T-cell.

TLS Online TPP Program

#Id: 7801

#Unit 2. Cellular Organization

An RNA helicase (Dbp5) located on the cytoplasmic side of the NPC removes NXF1 and NXT1 from the mRNA in a reaction that is powered by ATP hydrolysis.

TLS Online TPP Program

#Id: 8929

#Unit 2. Cellular Organization

Chk1, Chk2, and MK2

cause cell cycle arrest by inhibiting Cdc25

stabilizing the transcription factor p53, which induces the transcription of CKI p21 

TLS Online TPP Program

#Id: 1702

#Unit 4. Cell Communication and Cell Signaling

The resulting transient increase in the number of circulating neutrophils, called leukocytosis.

TLS Online TPP Program

#Id: 7416

#Unit 5. Developmental Biology

Two regions of Drosophila chromosome III contain most of homeotic genes: Antennapedia complex Bithorax complex