Initial concentrations of molecule species in the simulation.

Molecules not listed have initial concentrations of 0. A single molecule produces a concentration of 28 nM in the dendrite subvolumes of the single spine morphology; thus molecule concentrations less than 28 nM indicate that some subvolumes contained a single molecule and some did not, to produce the indicated concentration averaged over the entire morphology. General cytosol means that molecules populated the entire morphology. *Molecules initialized in the dendrite submembrane are specified in picoMoles per µm2 (picoSD). #Molecules initialized in the spine cytosol were excluded from the PSD, except for PKA species. &Only one of these concentrations applied, depending on whether molecules were anchored in the spine, or in the dendrite.