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.

TLS Online TPP Program

#Id: 9646

#XL - T Zoology

Active Raf phosphorylates MEK on one or two serine residues in its activation loop, activating MEK kinase activity

TLS Online TPP Program

#Id: 8295

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 8920

#XL - T Zoology

During anaphase, when cyclin B-CDK1 activity is extinguished but Aurora and Polo kinases are still active, Aurora B phosphorylates MKLP1 and displaces the 14-3-3, allowing compact the spindle midzone.

TLS Online TPP Program

#Id: 9501

#XL - R Botany

Alternaria alternata f. sp. lycopersici produces the AAL toxin,

which activates a plant cell death program in tomato (Solanum

lycopersicum) leaves.

TLS Online TPP Program

#Id: 2178

#XL - T Zoology

Mutation and natural selection act as opposing forces on detrimental alleles.