Lysosomes are membrane-enclosed organelles filled with soluble hydrolytic enzymes that digest macromolecules.

TLS Online TPP Program

#Id: 8331

#Unit 2. Cellular Organization

Cytochalasin D, 

a fungal alkaloid, depolymerizes actin filaments by binding to the (+) end of F-actin.

TLS Online TPP Program

#Id: 8332

#Unit 2. Cellular Organization

Latrunculin, 

a toxin secreted by sponges, binds and sequesters G-actin

TLS Online TPP Program

#Id: 8333

#Unit 2. Cellular Organization

Jasplakinolide,

a sponge toxin, enhances nucleation by binding and stabilizing actin dimers and lowering the Cc.

TLS Online TPP Program

#Id: 8334

#Unit 2. Cellular Organization

Phalloidin 

isolated from Amanita phalloides, binds at the interface between subunits in F-actin, locking adjacent subunits together and preventing depolymerization.

TLS Online TPP Program

#Id: 8335

#Unit 2. Cellular Organization

TLS Online TPP Program

#Id: 8336

#Unit 2. Cellular Organization

Actin filament treadmilling is accelerated by:

Profilin and Cofilin