Second possible mechanisms for neoblast specification during regeneration:

Multipotent progenitor cells are positioned throughout the planarian with their lineages specified based on their position. These divide and produce postmitotic blastema cells that differentiate into their specified fates.

 

TLS Online TPP Program

#Id: 5027

#Unit 3. Fundamental Processes

The bacterial chromosome is a single replicon; thus, the frequency of replication cycles is controlled by the number of Initiation events at the single origin.

TLS Online TPP Program

#Id: 6333

#Unit 8. Inheritance Biology

Environmental Sex Determination

TLS Online TPP Program

#Id: 6125

#Unit 3. Fundamental Processes

Humans have the enzyme hSMUG1, which removes any U residues that occur in single-stranded DNA during replication or transcription.  Two other human DNA glycosylases, TDG and MBD4, remove either U or T residues paired with G, generated by deamination of cytosine or 5-methylcytosine, respectively.

TLS Online TPP Program

#Id: 182

#Unit 5. Developmental Biology

Epithelial-Mesenchymal Transition

An orderly series of events whereby epithelial cells are transformed into mesenchymal cells.

TLS Online TPP Program

#Id: 5054

#Unit 3. Fundamental Processes

Phospholipids promote the exchange of ATP with ADP bound to DnaA