The Ramachandran Principle is that alpha helices, beta strands, and

turns are the most likely conformations for a polypeptide chain to 

adopt, because most other conformations are impossible due to

steric collisions between atoms. 

TLS Online TPP Program

#Id: 2279

#Unit 3. Fundamental Processes

Consensus Sequences

TLS Online TPP Program

#Id: 1312

#Unit 2. Cellular Organization

Cardiac glycosides (e.g., ouabain and digitalis) are a class of drugs that inhibits Na+-K+ ATPase.

TLS Online TPP Program

#Id: 3002

#Unit 13. Methods in Biology

Sodium bromide and sodium iodide are employed for the fractionation of lipoproteins
and the banding of DNA or RNA molecules, respectively.

TLS Online TPP Program

#Id: 6478

#Unit 3. Fundamental Processes

Promoters that do not contain a TATA element are called TATA-less promoters. Surveys of promoter sequences suggest that 50% or more of promoters may be TATA-less.

TLS Online TPP Program

#Id: 8651

#Unit 2. Cellular Organization

S phase cyclin-CDK accumulates in late G1 , they are immediately inactivated by binding of a CKI called Sic1