Figure 4From: Absolute quantification of endogenous angiotensin II levels in human plasma using ESI-LC-MS/MSDetection of stable isotope labeled angiotensin II by ESI-MS A: positive full scan spectrum B: positive MS/MS spectrum of the parent ion 528.8 m/z. The b6 fragment ion (794.4 m/z) was used for the quantification.Back to article page