Figure 5From: Current controlled vocabularies are insufficient to uniquely map molecular entities to mass spectrometry signalA neutromer distribution consists of isoneutromers --isomers that differ only in the number of neutrons they possess. They comprise a neutromer hull (dotted line). Each isoneutromer is in turn comprised of the set of isotopomers, those neutromers with identical isotopic composition but different position.Back to article page