At a point in time when the PM is most distant from the filament end, a new monomer is able to add on.
The insulin monomer The insulin monomer is a compact globular structure with a hydrophobic core.
If each monomer binds 10 chlorophylls then the LHCI more than doubles the light-harvesting size of PSI.
The other monomer is a 6 carbon chain with an amino group, -NH 2, at each end.
The monomer library files describe the internal geometry of a monomer library files describe the internal geometry of a monomer - they may contain complete or minimal descriptions of the monomers.