The chi-squared test helps to determine whether there is a notable difference between the normal frequencies and the observed frequencies in one or more classes or categories.

TLS Online TPP Program

#Id: 10385

#Unit 4. Cell Communication and Cell Signaling

Cross-presentation

TLS Online TPP Program

#Id: 10386

#Unit 4. Cell Communication and Cell Signaling

Presentation of nonpeptide antigens derived from pathogens involves the nonclassical class I–like CD1 molecule

TLS Online TPP Program

#Id: 10387

#Unit 4. Cell Communication and Cell Signaling

Class I presentation requires internal synthesis of virus protein, as shown by the requirement that the target cell be infected by live virus, and by the inhibition of class I presentation observed when protein synthesis was blocked by the inhibitor emetine.

TLS Online TPP Program

#Id: 10388

#Unit 4. Cell Communication and Cell Signaling

Class II presentation can occur with either live or replication-incompetent virus; protein synthesis inhibitors had no effect, indicating that new protein synthesis is not a necessary condition of class II presentation. 

TLS Online TPP Program

#Id: 10389

#Unit 4. Cell Communication and Cell Signaling

Class II, but not class I, presentation is inhibited by treatment of the cells with an agent that blocks endocytic processing within the cell (chloroquine).

TLS Online TPP Program

#Id: 83

#Unit 5. Developmental Biology

Fate map, 

A diagram that “maps” the larval or adult structures onto the region of the embryo from which they arose.