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TLS Online TPP Program

#Id: 3309

Nucleotide excision repair in human cells. 
A DNA lesion that causes distortion of the double helix, such as a thymine-thymine dimer, is initially recognized by a complex of the XP-C (xeroderma pigmentosum C protein) and 23B proteins.




#Unit 3. Fundamental Processes #DNA damage and repair mechanisms #Part B Pointers
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TLS Online TPP Program

#Id: 4733

#Unit 5. Developmental Biology

A stem cell retains the ability to divide and re-create itself while also having the ability to generate progeny capable of specializing into a more differentiated cell type.
TLS Online TPP Program

#Id: 6846

#Unit 5. Developmental Biology

Induction
Kind of interaction in which one group of cells changing the behavior of an adjacent set of cells, thereby causing them to change their shape, mitotic rate, or cell fate. 
TLS Online TPP Program

#Id: 6847

#Unit 5. Developmental Biology

There are two components of inductive interaction:
Inducer
Responder
TLS Online TPP Program

#Id: 6848

#Unit 5. Developmental Biology

Inducer 
the tissue that produces a signal (or signals) that changes the cellular behavior of the other tissue.
TLS Online TPP Program

#Id: 6849

#Unit 5. Developmental Biology

Responder, 
the cell or tissue being induced.
Cells of the responding tissue must have both 
A receptor protein for the inducing factor
The ability to respond to the signal
TLS Online TPP Program

#Id: 6981

#Unit 5. Developmental Biology

A stem cell retains the ability to divide and re-create itself while also having the ability to generate progeny capable of specializing into a more differentiated cell type.