Like SOCS proteins in the cytokine signaling, 

Smad7 also recruits an E3 ubiquitin ligase that targets TGF-β receptors for degradation.

TLS Online TPP Program

#Id: 10386

#XL - Q Biochemistry

Presentation of nonpeptide antigens derived from pathogens involves the nonclassical class I–like CD1 molecule

TLS Online TPP Program

#Id: 8107

#XL - T Zoology

Phosphate is often the limiting plant nutrient in soil, and perhaps the evolutionary pressure to conserve phosphate for more critical roles favored plants that made phosphate-free lipids.

TLS Online TPP Program

#Id: 7934

#XL - Q Biochemistry

The two key components in protein targeting in ER:

Signal recognition particle (SRP)

SRP receptor

TLS Online TPP Program

#Id: 8162

#XL - Q Biochemistry

For selective export of certain membrane proteins from the ER contain a di-acidic sorting signal (Asp-X-Glu, or DXE), which binds to the Sec24 subunit of the COPII

TLS Online TPP Program

#Id: 1967

#XL - T Zoology