Daudi tumor cells, which are unable to synthesize β 2-microglobulin. 

TLS Online TPP Program

#Id: 6307

#Unit 3. Fundamental Processes

Under these conditions, a ribosome-associated protein called RelA receives the “alarm” and produces the “alarmone” ppGpp, which destabilizes open promoter complexes whose lifetimes are normally short, thus inhibiting Transcription. 

The protein DskA binds to RNA polymerase and reduces the lifetimes of the rrn open promoters to a level at which they are responsive to changes in iNTP and ppGpp concentrations. Thus, DskA is required for the regulation of rrn  transcription by these two small molecules. 

TLS Online TPP Program

#Id: 10105

#Unit 4. Cell Communication and Cell Signaling

Hemidesmosomes

Function- Shape, rigidity, signaling

TLS Online TPP Program

#Id: 853

#Unit 2. Cellular Organization

Phytoplasmas are specialized bacteria that are obligate parasites of the phloem tissue

TLS Online TPP Program

#Id: 6017

#Unit 3. Fundamental Processes

In mammalian cells, Cdt1 is targeted for degradation by the action of a protein complex that is recruited to the origin of replication by PCNA, the eukaryotic counterpart of the bacterial b clamp.

TLS Online TPP Program

#Id: 7499

#Unit 4. Cell Communication and Cell Signaling

VpreB and λ5 (called a surrogate light chain), to form a pre-B-cell receptor.