Abundance- Its size—the total number of individuals in the population that exist with in a defined area.

TLS Online TPP Program

#Id: 1913

#Unit 4. Cell Communication and Cell Signaling

T2 cells also express BAFF-R, the receptor for the B-cell survival factor BAFF, whose expression is dependent on signals received through the BCR.

As B cells differentiate from the transitional T2 state to full maturity, they raise their levels of mIgD still further, while reducing the expression of mIgM. They also cease to express CD24 and CD93.

TLS Online TPP Program

#Id: 2310

#Unit 3. Fundamental Processes

The transition from the closed to the open complex involves structural changes in the enzyme and the opening of the DNA double helix to reveal the template and nontemplate strands. This “melting” occurs between positions –11 and +2, with respect to the transcription start site.

TLS Online TPP Program

#Id: 401

#Unit 2. Cellular Organization

Canonical H3 also known as H3.1 differs from the H3.3 variant at only four amino acid positions—three in the histone core and one in the N-terminal tail.

TLS Online TPP Program

#Id: 10066

#Unit 4. Cell Communication and Cell Signaling

Extracellular region of a classical cadherin contains five copies of the cadherin domain separated by flexible hinge regions

TLS Online TPP Program

#Id: 9960

#Unit 4. Cell Communication and Cell Signaling

Wnt proteins are modified by linkage of a monounsaturated fatty acid, palmitoleic acid, to a serine in the middle of the protein.