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TLS Online TPP Program

#Id: 9285

O2‐sensitive hemoprotein kinase FixL controls a regulatory cascade that activates transcription of nitrogen fixation genes

#Section 2: General Biology #Nitrogen Metabolism & Biological Nitrogen fixation #Part B Pointers
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TLS Online TPP Program

#Id: 8328

#Section 3: Genetics, Cellular and Molecular Biology

Hydrolysis of the bound nucleotide reduces the binding affinity of the subunit for neighbouring subunits and makes it more likely to dissociate from each end of the filament.
T form that adds to the filament and the D form that leaves.
TLS Online TPP Program

#Id: 8327

#Section 3: Genetics, Cellular and Molecular Biology
TLS Online TPP Program

#Id: 8326

#Section 3: Genetics, Cellular and Molecular Biology

The two ends of microfilament polymerize at different rates:
fast-growing end - plus end
slow-growing end - minus end
TLS Online TPP Program

#Id: 8325

#Section 3: Genetics, Cellular and Molecular Biology

Critical concentration (Cc)
minimal concentration of monomers at which filaments form
TLS Online TPP Program

#Id: 8324

#Section 3: Genetics, Cellular and Molecular Biology

The rate of addition of monomers is given by
rate constant kon (M–1 sec–1 )
The rate of loss is given by koff (sec–1)
TLS Online TPP Program

#Id: 8323

#Section 3: Genetics, Cellular and Molecular Biology