TLS Online TPP Program

#Id: 1730

#Unit 4. Cell Communication and Cell Signaling

Lyn, can play a negative as well as a positive role in FcεRI signaling by phosphorylating and activating the inhibitory FcεRIIB.

TLS Online TPP Program

#Id: 10291

#Unit 4. Cell Communication and Cell Signaling

The second phase of T-cell development

1.Positive selection: Selection for those cells whose T-cell receptors engage self-MHC.

2.Negative selection: Selection against those cells whose T-cell receptors bind too strongly to self-peptide/MHC combinations.

3.Lineage commitment: Commitment of thymocytes to effector cell lineages, including CD4 helper or CD8 cytotoxic populations

TLS Online TPP Program

#Id: 1357

#Unit 4. Cell Communication and Cell Signaling

Family of Cytokines

• Interleukins

• Interferons

• Growth hormone

• Prolactin

• Granulocyte colony–stimulating factor

• Thrombopoietin

• Erythropoietin (Epo)

TLS Online TPP Program

#Id: 9489

#Unit 6. System Physiology – Plant

Biotrophic fungi usually penetrate the rigid cell wall via the formation of a specialized infection structure on the plant

surface called an appressorium. Then, the emerging penetration

peg breaches the rigid plant cell wall and provides entry into the plant cell. Finally, a haustorium forms upon entry into the plant cell.

TLS Online TPP Program

#Id: 6122

#Unit 3. Fundamental Processes

The deamination generates a G-T/C-T mismatch pair, MutL and MutS remove T from both G-T and C-T mismatches.