The identification of a lipid-mobilizing factor from sheep midbrain

The mass spectrum of a lipolytic substance from purified sheep midbrain extract indicated that it was isoprenaline, not N-n-propylnoradrenaline, noradrenaline or adrenaline. The identification of the lipid-mobilizing factor as isoprenaline was confirmed qualitatively by t.l.c. and g.l.c. and quantitatively by determination of its lipolytic activity and u.v. absorption and by fluorimetric determination of its catecholamine content.