Photosynthetic photon flux density (PPFD)—the flux of light (usually expressed as micromoles per square meter per second [μmol m–2 s–1]) within the photosynthetically active range (400–700 nm).

TLS Online TPP Program

#Id: 1741

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 1742

#Unit 4. Cell Communication and Cell Signaling

MHC-Peptide Interaction

TLS Online TPP Program

#Id: 1743

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 1744

#Unit 4. Cell Communication and Cell Signaling

One individual, however, expresses only a small number of these molecules—up to six different class I molecules and 12 or more different class II molecules.

TLS Online TPP Program

#Id: 1745

#Unit 4. Cell Communication and Cell Signaling

MHC molecules in mouse

TLS Online TPP Program

#Id: 1746

#Unit 4. Cell Communication and Cell Signaling

IFN-  has been shown to induce expression of the class II transcriptional activator (CIITA).