Xic is a cis-acting locus that contains the information necessary to count X chromosomes and inactivate all copies but one. Inactivation spreads from Xic along the entire X chromosome.

TLS Online TPP Program

#Id: 2813

#Unit 13. Methods in Biology

Reversed-phase liquid chromatography differs from most other forms of chromatography in that the stationary phase is essentially inert and only non-polar (hydrophobic) interactions are possible with analytes.

TLS Online TPP Program

#Id: 5059

#Unit 3. Fundamental Processes

Two-state assembly model of bacterial replication initiation

TLS Online TPP Program

#Id: 1363

#Unit 4. Cell Communication and Cell Signaling

JAK kinases become activated after ligand binding and receptor dimerization.

TLS Online TPP Program

#Id: 1267

#Unit 7. System Physiology – Animal

Zona glomerulosa lacks 17α-hydroxylase. 

TLS Online TPP Program

#Id: 3254

#Unit 3. Fundamental Processes

Tautomeric forms of the four common bases in DNA.