A typical membrane lipid of archaea.

Diphytanyl moieties are 8 five-carbon isoprene groups condensed end-to-end.

TLS Online TPP Program

#Id: 765

#Unit 3. Fundamental Processes

The closed complex is converted into an open complex of 1.3 turns of the double helix in a series of steps by first “melting” a short region of DNA. 

This Isomerization is essentially irreversible and, once complete, typically guarantees that transcription will subsequently initiate.

TLS Online TPP Program

#Id: 7793

#Unit 2. Cellular Organization

Nuclear-export signal (NES)

ribonuclear protein complexes that shuttle between the nucleus and the cytoplasm. Such shuttling proteins contain NES.

TLS Online TPP Program

#Id: 9310

#Unit 4. Cell Communication and Cell Signaling

In the dark, 

membrane potential of a rod cell is about −30 mV (Depolarized state)

Rod cells release neurotransmitters (glutamate) constantly

TLS Online TPP Program

#Id: 9618

#Unit 4. Cell Communication and Cell Signaling

Neuregulins 1, 2, 3, and 4, bind to HER4 that, like HER1, can also form homodimers.

TLS Online TPP Program

#Id: 7285

#Unit 6. System Physiology – Plant

Evolution of oxygenase activity occurred before the time, about 2.5 billion years ago, when production of O2 by photosynthetic organisms started to raise the oxygen content of the atmosphere.