Before revision: A key idea that motivated the development of the Registry was to develop an abstraction hierarchy implemented through the parts categorization systemEndy, D "Foundations for engineering biology" Nature 438, 449-453 (24 November 2005).
After revision: A key idea that motivated the development of the Registry was to develop an abstraction hierarchy implemented through the parts categorization systemEndy, D "Foundations for engineering biology" Nature 438, 449–453 (24 November 2005).