TIR1 recruits AUX/ IAA proteins to the SCF -TIR1 complex in an auxin-dependent manner. Once recruited by auxin, AUX/IAA proteins are ubiquitinated by the E3 ligase activity of the SCF-TIR1 complex, which marks the protein for destruction by the 26S proteasome.

TLS Online TPP Program

#Id: 1994

#Unit 3. Fundamental Processes

The polyadenylation site has two cis-acting signals: 

An upstream AAUAAA motif, which is usually located 11 to 30 nucleotides from the site  A downstream U-rich or GU-rich element.

TLS Online TPP Program

#Id: 4620

#Unit 13. Methods in Biology

Glycosphingolipids as determinants of blood groups.

TLS Online TPP Program

#Id: 8466

#Unit 1. Molecules and their Interaction Relevant to Biology

Polyleucine and polyalanine readily form a-helical structures.

TLS Online TPP Program

#Id: 9061

#Unit 4. Cell Communication and Cell Signaling

The GPK in skeletal muscle is a huge protein with multiple subunits:

Kinase subunit contains the catalytic activity that activates GP 

Regulatory subunits is the ubiquitous protein calmodulin

TLS Online TPP Program

#Id: 7351

#Unit 11. Evolution and Behavior

Negative assortative mating

People only select mates who are phenotypically different from themselves for selective traits. 

Increases the frequency of heterozygous genotypes (Aa).