If this ratio R is equal to 1, then the population is randomly dispersed.

If R is significantly greater than 1, the population is evenly dispersed

If R is significantly less than 1, the population is clumped

TLS Online TPP Program

#Id: 9269

#XL - Q Biochemistry

Fe protein 

contains 2 identical subunits (dimer) – nif H

Each subunit has MW of 30 ~ 72 kD.

Each subunit contains an Fe-S cluster (4Fe and 4S2-).

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#Id: 9270

#XL - Q Biochemistry

MoFe protein 

2 pairs of identical subunits (tetramer, nif D & nif K)

A total of MW 180 ~ 235kD

Each subunit has 2 Mo-Fe-S clusters.

Both Fe proteins and MoFe proteins are sensitive to O2. 

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#Id: 9271

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 9272

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 9273

#XL - Q Biochemistry

TLS Online TPP Program

#Id: 9274

#XL - Q Biochemistry

Bacterial Nod genes are activated to initiate nodulation in plants by plant signals flavonoids