ABA (C15) biosynthesis takes place in chloroplasts and cytosol from C40 precursor

ABA closes stomata in response to water stress

ABA promotes root growth and inhibits shoot growth at low water potentials

TLS Online TPP Program

#Id: 8887

#Unit 2. Cellular Organization

The mitotic CDKs phosphorylate specific nucleoporins, which causes nuclear pore complexes to dissociate during prophase. 

TLS Online TPP Program

#Id: 8888

#Unit 2. Cellular Organization

A key function of mitotic CDKs, together with other protein kinases and ubiquitin-protein ligases, is to induce the formation of the mitotic spindle, also known as the mitotic apparatus.

TLS Online TPP Program

#Id: 8889

#Unit 2. Cellular Organization

Centrosomes contain γ tubulin, which forms specific ringlike complexes (γ TuRCs) that, have the ability to nucleate microtubules and form a bipolar spindle

TLS Online TPP Program

#Id: 8890

#Unit 2. Cellular Organization

Mitotic spindle attach to chromosomes via specialized protein structures known as kinetochores

TLS Online TPP Program

#Id: 8891

#Unit 2. Cellular Organization

Kinetochores assemble on regions of chromosomal DNA marked by a centromere-specific H3 histone variant called CENP-A.

TLS Online TPP Program

#Id: 8892

#Unit 2. Cellular Organization

Amphitelic attachment, 

sister kinetochores attach to microtubules emanating from opposite spindle poles, they are stably attached