CHAIN counts: chains.txt.
ATOM counts follow.
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In top.js:

var apiSizeAU = -1; // non-hydrogen atoms in model 1 of AU/deposited model, including altlocs.
var apiSizeBM = new Array(); // ditto for each biomolecule.

	var apiFail = false; // if either status or atom-count api fails.
	var apiBMCount = -1; // number of biomolecules obtained via API.
	var apiResiduesAU = -1; // Residues in model 1 of deposited model.
	var apiResiduesBM = new Array(); // Residues/biomolecule.
	var apiMWAU = -1; // Molecular mass of deposited model less solvent.
	var apiMWBM = new Array(); // MW/biomolecule.
	var apiBMOverAU = new Array(); // Ratio of BM residues to AU residues.
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SIMP & CUTOFFS:
	"cao" means Carbon Alphas Only.
	AU = Asymmetric Unit.
	BU = Biological Unit
	BM = BioMolecule same as BU.
	BB = BackBone atoms (alpha carbons or nucleic phosphorus atoms).

moltab.js
	bmNumber 0 for AU; >1 for &bu=N

	simpBBOnly  cao
	simpUsedDivisor  >1 for subset of cao. simpBBOnly true when >=1.
	
	simpCutoffOption          25K
	simpCutoffUnconditional   100K

	simpCutoffBBOnly   25K cao
	simpCutoffBBMax   100K cao  simpMax true to allow this many cao.

	simpForceNone true if &nosimp

top.js	
	forceAU true if &au=1, then simpBBOnly false
	forceBBOnly 0, or >=1 if &bbonly=N

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See getAtomCounts() in modeldat.js

  allAtomCount = jmolEvaluate("{*}.count");
  allAtomM1C1Count = jmolAtomCount("all"); // model 1, configuration 1
	allAtomAllModelC1Count = jmolAtomCountAllModels("all"); // configuration 1

  allAtomNonHM1C1Count = jmolAtomCount("not hydrogen");

  proteinNonHCount = jmolAtomCount("protein and not hydrogen");
  nucleicNonHCount = jmolAtomCount("nucleic and not hydrogen");
  ligandNonHCount = jmolAtomCount("not (solvent, protein, nucleic, hydrogen)");