F-box proteins called KISS ME DEADLY (KMD) proteins

negatively regulates the cytokinin response by targeting type-B ARR proteins for degradation via the E3 ubiquitin ligase complex, SCF-KMD

TLS Online TPP Program

#Id: 435

#Unit 2. Cellular Organization

The nucleosome consists of approximately equal masses of DNA and histones (including H1). The predicted mass of the nucleosome is 262 kD.

TLS Online TPP Program

#Id: 436

#Unit 2. Cellular Organization

The four core histones are present in equal amounts in the cell. H1 is half as abundant as the other histones, which is consistent with the finding that only one molecule of H1 can associate with a nucleosome.

TLS Online TPP Program

#Id: 437

#Unit 2. Cellular Organization

One turn around the nucleosome takes 80 bp of DNA

TLS Online TPP Program

#Id: 438

#Unit 2. Cellular Organization

Two points separated by 80 bp in the free double helix may actually be one on another on nucleosome surface.

 

TLS Online TPP Program

#Id: 439

#Unit 2. Cellular Organization

H1 is most basic and heaviest

TLS Online TPP Program

#Id: 440

#Unit 2. Cellular Organization

Runs of two or more AT base pairs facilitate the bending of DNA, while runs of two or more GC base pairs have the opposite effect.