The binding of Ca2+, Co2+, Ni2+, Cu2+, and Zn2+ cations to angiotensin I determined by mass spectrometry based techniques

- Angiotensin I-metal interactions are examined by ion mobility and CID.
- Metal-binding sites are proposed.
- Metal-binding sites influence the populations of conformations.
- We examine populations of conformations before and after collisional activation.