Table 1. Fragment ions from FRIPS and ECD of AARAAACAA disulfide bridged dimer and their relative yields.

Fragment type	Relative yield (%)
	FRIPS	ECD
Backbone	0.5	15.7
Side-chain loss	1.1	∼0
Overall disulfide	98.4	84.3
C–S bond cleavage	28.0	8.3
S–S bond cleavage	72.0	91.7