Communities may be identified and recognized by several features that may be quantitative and qualitative.

Quantitative characters are those that can be measured, e.g., density, abundance, frequency, cover area and basal area of species present in a given area. 

TLS Online TPP Program

#Id: 1685

#Unit 4. Cell Communication and Cell Signaling

Only three of the proteins implicated in V(D)J recombination are unique to lymphocytes: RAG1, RAG2, and Terminal deoxynucleotidyl Transferase (TdT)

TLS Online TPP Program

#Id: 1686

#Unit 4. Cell Communication and Cell Signaling

Recombination between the D and a JH gene segment occur during pre pro-B cell to the early pro-B-cell stage.

TLS Online TPP Program

#Id: 1687

#Unit 4. Cell Communication and Cell Signaling

Recombination between the VH and D-JH segments follows during the pro-B-cell stage.

TLS Online TPP Program

#Id: 1688

#Unit 4. Cell Communication and Cell Signaling

VpreB and λ5 (called a surrogate light chain), to form a pre-B-cell receptor.

TLS Online TPP Program

#Id: 1689

#Unit 4. Cell Communication and Cell Signaling

Light-chain recombination occurs at the small pre-B-cell stage of B-cell development.

TLS Online TPP Program

#Id: 1690

#Unit 4. Cell Communication and Cell Signaling

Site of DNA cleavage- Recombination Signal Sequence (RSS)