Raja Dey wrote:

Dear Friends, Can anyone tell what the number popping up against every bar of the density fit analysis histogram in COOT is? Is it a correlation co-eff between Fo and Fc or something else? I am interested to know how is this parameter calculated.

Is is the average electron density at the atom centres of the atoms in the residue.

Is it possible to build a model in COOT if only the electron density map and sequence is given?

If it is traceable, yes.

Although I know there are some programs to create an initial model. I am wondering whether COOT can do that.

With your input, yes: Baton-building.