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TLS Online TPP Program

#Id: 10350

B cells migrate to the lymphoid follicles. They are directed there by chemokine interactions between CXCL13, which is secreted by follicular dendritic cells (FDCs).

#Unit 4. Cell Communication and Cell Signaling #B-cell #Part B Pointers
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TLS Online TPP Program

#Id: 3687

#Unit 2. Cellular Organization

Pathogenicity islands GC content often differs from that of the rest of the genome, and it is likely that these regions are spread among bacteria by a process of horizontal transfer.
TLS Online TPP Program

#Id: 3688

#Unit 2. Cellular Organization

Bacillus anthracis has two large plasmids (extrachromosomal DNA molecules), one of which has a pathogenicity island that includes the gene encoding the anthrax toxin.
TLS Online TPP Program

#Id: 3689

#Unit 2. Cellular Organization
TLS Online TPP Program

#Id: 3690

#Unit 2. Cellular Organization

coli have average polypeptide lengths 317 amino acids, S. cerevisiae- 484 and C. elegans - 442 have average polypeptide lengths
TLS Online TPP Program

#Id: 3691

#Unit 2. Cellular Organization

The sum of the number of unique genes and the number of gene families is an estimate of the number of types of genes.

The minimum size of the proteome can be estimatedfrom the number of types of genes.
TLS Online TPP Program

#Id: 3692

#Unit 2. Cellular Organization