Barber M, Bordoli R S, Elliott G J, Tyler A N, Bill J C, Green B N
Biomed Mass Spectrom. 1984 Apr;11(4):182-6. doi: 10.1002/bms.1200110409.
Mass measurements of the protonated molecules [M + H]+ of four insulins are presented. In addition, structurally significant fragment ions are observed in the mass spectrum and metastable scanning has been used to link these ions to the protonated molecule.