Septins 

GTP-binding proteins 

serve as an additional filament system in all eukaryotes except terrestrial plants. 

TLS Online TPP Program

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#Unit 4. Cell Communication and Cell Signaling

Allograft is tissue transferred between genetically different members of the same species Xenograft is tissue transferred between different species

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#Id: 1884

#Unit 4. Cell Communication and Cell Signaling

T cells initiate the adaptive immune response by interacting MHC on antigen-presenting cells that have been exposed to pathogens.

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#Id: 1885

#Unit 4. Cell Communication and Cell Signaling

Development of T cells from hematopoietic stem cells on bone marrow stromal cells expressing the Notch ligand.

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#Id: 1886

#Unit 4. Cell Communication and Cell Signaling

T-Cell Development

a. Commitment of hematopoietic precursors to the T cell lineage

b. The initiation of antigen receptor gene rearrangements

c.  The selection and expansion of cells that have successfully rearranged one of their T-cell receptor genes (-selection).

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#Id: 1887

#Unit 4. Cell Communication and Cell Signaling

Time course of appearance of  thymocytes and  thymocytes during mouse fetal development.

TLS Online TPP Program

#Id: 1888

#Unit 4. Cell Communication and Cell Signaling

Allelic exclusion

Most T cells fully rearrange and express a TCR chain from only one of their two TCR alleles