In cytokine receptors, 

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

TLS Online TPP Program

#Id: 10095

#XL - T Zoology

Hemidesmosomes are integrin-containing anchoring junctions that attach cells to elements of the underlying extracellular matrix.

TLS Online TPP Program

#Id: 8605

#XL - T Zoology

S phase Cyclin–CDKs

In human - cyclin A-CDK 2 

In budding yeast - CIb 5/6-Cdc 28

TLS Online TPP Program

#Id: 9095

#XL - T Zoology

TLS Online TPP Program

#Id: 4385

#XL - T Zoology

Proteins fold to their native conformations via directed pathways rather than stumbling on them through random conformational searches.

TLS Online TPP Program

#Id: 8903

#XL - T Zoology

Chromosome compaction involving progressive chromosome looping:

During prophase, condensin II binds DNA and extrudes large loops

In prometaphase, condensin I forms additional loops nested within the loops formed by condensin II