Integrin exist in two conformations: 

Inactive, low-affinity, “bent” conformation  

Active, high-affinity, “extended” conformation

TLS Online TPP Program

#Id: 10428

#Unit 4. Cell Communication and Cell Signaling

DNA methylation occurs at cytosines of CpG islands, leads to repression of the promoters. DNA hypermethylation & DNA hypomethylation is also a hallmark of cancer.

TLS Online TPP Program

#Id: 7842

#Unit 1. Molecules and their Interaction Relevant to Biology

Two sugars that differ in configuration at only one chiral center are described as epimers.

TLS Online TPP Program

#Id: 3494

#Unit 12. Applied Biology

Artificial seeds are produced by encapsulating somatic embryos in calcium alginate gel.

TLS Online TPP Program

#Id: 9409

#Unit 11. Evolution and Behavior

Many eyes hypothesis‐ By living in groups, individuals may decrease the amount of time each spends scanning for predators and increase the time they have to feed. 

TLS Online TPP Program

#Id: 7987

#Unit 10. Ecological Principles