polylysine is a random coil at pH values below about 11, where repulsion of positive charges prevents helix formation. At pH 12, where polylysine is a neutral peptide chain, it readily forms an a-helix.

TLS Online TPP Program

#Id: 10319

#Unit 4. Cell Communication and Cell Signaling

Fas-L on the cytotoxic T cell binds to its receptor, the Fas protein on the tumor cells, an apoptotic signaling pathway in the tumor cells becomes activated, which also leads to tumor cell death. 

TLS Online TPP Program

#Id: 8927

#Unit 2. Cellular Organization

ATM and DNA-PK are specifically activated by double-strand breaks

TLS Online TPP Program

#Id: 6940

#Unit 8. Inheritance Biology

An inversion may break a gene into two parts, with one part moving to a new location and destroying the function of that gene.

TLS Online TPP Program

#Id: 5782

#Unit 7. System Physiology – Animal

Colloid consists predominantly of the glycoprotein, thyroglobulin

TLS Online TPP Program

#Id: 10384

#Unit 4. Cell Communication and Cell Signaling

Class II MHC transcriptional activator called CIITA and another transcription factor called RFX, have both been shown to activate the promoter of class II MHC genes.

Defects in these transcription factors cause one form of bare lymphocyte syndrome.