Rapid and efficient sequence determination of a 4 nmol sample of adipokinetic hormone I (AKH I) using FAB tandem mass spectrometry.

Fast atom bombardment mass spectrometery in conjunction with tandem mass spectrometry provided the unambiguous sequence determination of the adipokinetic hormone I. The amount of sample needed is of the order less than or equal to 4 nmol, and the complete analysis is performed in less than 4 h.