In the absence of light,  bound 11-cis-retinal locks the rhodopsin into its inactive (R) conformation

TLS Online TPP Program

#Id: 8522

#XL - Q Biochemistry

Lysine acetylation 

ε-amino group of a specific lysine of α-tubulin

Microtubules are stabilized against breakage (centrioles, basal bodies, & primary cilia)

TLS Online TPP Program

#Id: 9041

#XL - T Zoology

TLS Online TPP Program

#Id: 9452

#XL - T Zoology

In cytokine receptors, 

the receptor and kinase are separate polypeptides, encoded by different genes, yet are bound tightly together.

TLS Online TPP Program

#Id: 9455

#XL - T Zoology

Cytokine receptors are stably associated with one or two of the four known JAKs:

JAK1, JAK2, JAK3, and Tyk2

TLS Online TPP Program

#Id: 1352

#XL - T Zoology

GRB2 SH3 domains bind to proline-rich sequences in Sos