All four core histones show a similar type of structure in which three a-helices are connected by two loops. This highly conserved structure is called the histone fold.

TLS Online TPP Program

#Id: 9860

#Unit 6. System Physiology – Plant

In the dark, the maximum absorption of the FMN chromophore is around 450 nm. 

Blue light induces the formation of a covalent bond between FMN and a cysteine residue, shifting the absorption maximum to 390 nm via a LOV660 intermediate form. The reaction is reversible in darkness.

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#Id: 437

#Unit 2. Cellular Organization

One turn around the nucleosome takes 80 bp of DNA

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#Id: 7388

#Unit 5. Developmental Biology

TLS Online TPP Program

#Id: 5932

#Unit 10. Ecological Principles

In connectedness webs all the known links are drawn and equal importance is attached to each link

TLS Online TPP Program

#Id: 8580

#Unit 2. Cellular Organization

In humans, three genes encode lamins: 

Lamins A and C (alternatively spliced gene) 

Lamins B1 and B2