IgA is the principal class in secretions, the most important being those from the epithelia lining the intestinal and respiratory tracts.

Dimeric IgA operates mainly on epithelial surfaces.

This monomeric IgA is predominantly of the subclass IgA1; the ratio of IgA1 to IgA2 in the blood is 10:1.

IgA antibodies produced by plasma cells in the gut are dimeric and predominantly of subclass IgA2; the ratio of IgA2 to IgA1 in the gut is 3:2.

TLS Online TPP Program

#Id: 10311

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 9560

#Unit 11. Evolution and Behavior

They supposed that such mutant forms constituted new species and thus believed that natural selection was not necessary to account for the origin of species. The last influential mutationist was Richard Goldschmidt

TLS Online TPP Program

#Id: 705

#Unit 3. Fundamental Processes

Proofreading typically decreases the error rate in replication from10-5 to 10-7 per base pair replicated.

TLS Online TPP Program

#Id: 829

#Unit 4. Cell Communication and Cell Signaling

Race between effector and ETI evolution is an example of coevolution between plants and pathogens

TLS Online TPP Program

#Id: 6217

#Unit 12. Applied Biology