It does not exist as an independent unit (e.g., analogous to the ribosome), but assembles de novo at the origin for each replication cycle.

TLS Online TPP Program

#Id: 4007

#Unit 2. Cellular Organization

Matrix-associated regions (MARs) may be identified by characterizing the DNA retained by the matrix isolated in vivo (left) or by identifying the fragments that can bind to the matrix from which all DNA has been removed (right).

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#Id: 3240

#Unit 3. Fundamental Processes

Mutations that alter a single nucleotide are called point mutations.

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#Id: 9116

#Unit 10. Ecological Principles

The prey zero isocline 

A specific number of predators will keep the prey population at zero growth.

P=r/s

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#Id: 9364

#Unit 4. Cell Communication and Cell Signaling

Simultaneously, two serines in each Smad2/3 phosphorylated by RI receptor kinase bind to phosphoserine-binding sites in the MH2 domains of a Smad4

TLS Online TPP Program

#Id: 7907

#Unit 2. Cellular Organization

Parkinson’s disease is caused by mutations in two gene encoding proteins that can mediate mitophagy:

PINK1 (a kinase)

Parkin (E3 ubiquitin ligase)