The protein DskA  also plays an important role. It binds to RNA polymerase and reduces the lifetimes of the rrn open promoters to a level at which they are responsive to changes in iNTP and ppGpp concentrations. 

TLS Online TPP Program

#Id: 2576

#Unit 7. System Physiology – Animal

Glucose reabsorption is a two-step process: 

Na+-glucose cotransport across the luminal membrane 

Facilitated glucose transport across the peritubular membrane

TLS Online TPP Program

#Id: 7158

#Unit 5. Developmental Biology

TLS Online TPP Program

#Id: 8762

#Unit 1. Molecules and their Interaction Relevant to Biology

Thermostable proteins have such a high incidence of salt bridges.

TLS Online TPP Program

#Id: 4911

#Unit 13. Methods in Biology

Variance always has squared units. For example, the variance of a set of weights estimated in kilograms will be given in kg squared.

TLS Online TPP Program

#Id: 3361

#Unit 3. Fundamental Processes

Photoreactivation; Ultraviolet irradiation causes formation of thymine dimers. Upon exposure to light, DNA photolyase breaks the ring formed between the dimers to restore the two thymine residues.