Core enzyme binds indiscriminately to any DNA. Sigma factor reduces the affinity for sequence-independent binding and confers specificity for promoters.

TLS Online TPP Program

#Id: 5454

#Unit 7. System Physiology – Animal

The basis for the relative refractory period is the higher K+ conductance than is present at rest. 

TLS Online TPP Program

#Id: 9843

#Unit 6. System Physiology – Plant

The HY4 gene encodes a 75-kDa cry1 protein with significant sequence homology to microbial DNA photolyase

TLS Online TPP Program

#Id: 4719

#Unit 13. Methods in Biology

Molecules such as FAD (flavin adenine dinucleotide), NADH and NADþ are important coenzymes of proteins involved in electron transfer reactions (RedOx reactions). They can be conveniently assayed by using their UV/Vis absorption: 438 nm (FAD), 340 nm (NADH) and 260 nm (NADþ).

TLS Online TPP Program

#Id: 2581

#Unit 7. System Physiology – Animal

In early proximal convoluted tubule

sodium is reabsorbed by co-transport along with glucose, amino acids, & other solutes

TLS Online TPP Program

#Id: 9976

#Unit 4. Cell Communication and Cell Signaling

Formation of the Wnt/Fz/LRP complex at the cell

surface causes the adaptor protein Dishevelled, to bind to Fz and Axin to bind to LRP, resulting destabilization and inactivation of the destruction complex