A precipitation curve for a system of one antigen and its antibodies. This plot of the amount of antibody precipitated versus increasing antigen concentrations (at constant total antibody) reveals three zones: 

TLS Online TPP Program

#Id: 6007

#Unit 3. Fundamental Processes

Most origins are localized in regions between genes, which suggests that it may be important for the local chromatin structure to be in a nontranscribed condition.

TLS Online TPP Program

#Id: 6856

#Unit 3. Fundamental Processes

TLS Online TPP Program

#Id: 1761

#Unit 4. Cell Communication and Cell Signaling

Self-reactive B cells can undergo receptor editing.

In this process, the antigen-specific V region is “edited” or switched for a different V-region gene segment via V(D)J recombination,

TLS Online TPP Program

#Id: 7071

#Unit 3. Fundamental Processes

TLS Online TPP Program

#Id: 9360

#Unit 4. Cell Communication and Cell Signaling

Smad2/3 become phosphorylated by active RI receptors and together with Smad4 move into the nucleus to activate gene transcription