In the absence of Wnts,

“free” β-catenin are targeted for degradation by a cytosolic destruction complex that is held together by the tumor suppressor protein Axin.

TLS Online TPP Program

#Id: 6142

#Unit 3. Fundamental Processes

transcription-coupled repair (TC-NER) TFIIH, itself a large complex, which includes the products of two XP genes, XPB and XPD. 

TLS Online TPP Program

#Id: 9417

#Unit 11. Evolution and Behavior

The second part of Darwin’s hypothesis is that exaggerated secondary sexual traits decrease survival.

TLS Online TPP Program

#Id: 2504

#Unit 13. Methods in Biology

IEF is a highly sensitive analytical technique and is particularly useful for studying  microheterogeneity in a protein. For example, a protein may show a single band on an SDS gel but may show three bands on an IEF gel. This may occur, for example, when a protein exists in mono-, di- and tri-phosphorylated forms. 

TLS Online TPP Program

#Id: 721

#Unit 3. Fundamental Processes

The single circular chromosomes of Sulfolobus species have three origins and thus are composed of three replicons.

TLS Online TPP Program

#Id: 2636

#Unit 13. Methods in Biology

S1 mapping the 5’-end of a transcript