During cleavage, β-catenin enters the nuclei and binds with Tcf3 to form a transcription factor that activates genes encoding proteins Siamois and Twin.

TLS Online TPP Program

#Id: 3046

#Unit 3. Fundamental Processes

The general importance of FEN 1 is that it prevents flaps of DNA from generating structures that may cause deletions or duplications in the genome.

TLS Online TPP Program

#Id: 1764

#Unit 4. Cell Communication and Cell Signaling

Self antigens are not uncommon in the periphery, Two factors contribute to this:                                                                                                                             a. not all self a. antigens are expressed in the central lymphoid organs where negative selection occurs

b. there is a threshold requirement for affinity to self antigens before clonal deletion is triggered, allowing some weakly self-reactive clones to survive the weeding-out process.

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#Id: 8968

#Unit 11. Evolution and Behavior

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#Id: 5801

#Unit 7. System Physiology – Animal

TRH receptors in the pituitary cell membrane activates the phospholipase second messenger system, leads to TSH release.

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#Id: 2043

#Unit 8. Inheritance Biology

Sex-limited characteristic, characteristic encoded by autosomal genes and expressed in only one sex.