void checkNewGroup(int atomIndex) {
		Atom atom = atoms[atomIndex];
		if (atom.group == null)
			checkNewGroup(atomIndex, atom.modelIndex, '\0', null, 0, '\0');
		else checkNewGroup(atomIndex, atom.modelIndex, atom.getChainID(), atom.getGroup3(), atom.getSeqNumber(), atom
				.getInsertionCode());
	}