HER2 can signal only by forming heterodimers with ligand-bound HER1, HER3, or HER4

TLS Online TPP Program

#Id: 2399

#Unit 3. Fundamental Processes

There are two classes of snoRNPs involved in rRNA processing in nucleolus. 

The box H/ACA snoRNPs are involved in pseudouridylylation, and box C/D snoRNPs function in 2-O-methylations.

TLS Online TPP Program

#Id: 2299

#Unit 3. Fundamental Processes

By 1969 SDS-PAGE of RNA polymerase from E. coli had shown several subunits

1.2 very large subunits are b (150 kD) and b’ (160 kD)

2. Sigma (s) at 70 kD

3. Alpha (a) at 40 kD – 2 copies present in holoenzyme

4. Omega (w) at 10 kD 

TLS Online TPP Program

#Id: 4632

#Unit 13. Methods in Biology

 What are the principles in flow cytometry?

• Light scattered by a laser or arc lamp

• Specific fluorescence detection

• Hydrodynamically focused stream of particles

• Electrostatic particle separation for sorting

• Multivariate data analysis capability

TLS Online TPP Program

#Id: 1895

#Unit 4. Cell Communication and Cell Signaling

T-Cell Activation and Differentiation

TLS Online TPP Program

#Id: 10545

#Unit 4. Cell Communication and Cell Signaling

Binding of cytochrome c to the Apaf1 triggers formation of an apoptosome containing seven molecules each of Apaf and cytochrome c and having a sevenfold symmetry.