Darwin’s evolutionary theory - Common descent

TLS Online TPP Program

#Id: 9331

#Unit 4. Cell Communication and Cell Signaling

In the dark, most transducin is localized to the outer segment, while most arrestin is found in other parts of the cell; in this condition, vision is most sensitive to very low light levels.

TLS Online TPP Program

#Id: 9332

#Unit 4. Cell Communication and Cell Signaling

In bright light, little transducin is found in the outer segment, and abundant arrestin is found there; in this condition,vision is relatively insensitive to small changes in light.

TLS Online TPP Program

#Id: 9333

#Unit 4. Cell Communication and Cell Signaling

An evolutionarily conserved family of receptor serine kinases - TGF-β receptor family

TLS Online TPP Program

#Id: 9334

#Unit 4. Cell Communication and Cell Signaling

An evolutionarily conserved family of signaling molecules, TGF-β superfamily includes: 

TGF-β family, Nodal and activin families, BMPs, Vg1 family, GDNF, AMH

TLS Online TPP Program

#Id: 9335

#Unit 4. Cell Communication and Cell Signaling

Drosophila homolog of TGF-β = Dpp

TLS Online TPP Program

#Id: 9336

#Unit 4. Cell Communication and Cell Signaling

Kinase domains in TGF-β receptors phosphorylate and trigger the activation of a conserved class of transcription factors - Smads