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. Author manuscript; available in PMC: 2009 Sep 23.
Published in final edited form as: J Proteome Res. 2007 Dec 12;7(1):138–144. doi: 10.1021/pr070363z

Table 3.

Native Disulfide-Linked Peptides in Digest of RNaseA under Basic and Acidic Conditions Identified in the Confirmatory Searcha

digestion condition disulfide bond number of matches pp value sum/high disulfide-linked peptides
pH = 8.0 C26—C84 41 554.9/21.9 [26–29]-S-S-[80–85]
[26–30]-S-S-[80–85]
[26–31]-S-S-[80–85]
[26–31]-S-S-[77–85]
C40—C95 74 629.3/18.9 [40–46]-S-S-[93–97]
[40–46]-S-S-[92–97]
[40–46]-S-S-[92–98]
C58—C110 10 112.7/17.2 [47–61]-S-S-[105–115]
C65—C72 58 807.6/32.9 [62–73]*
[62–76]*
[62–66]-S-S-[67–73]
[62–66]-S-S-[67–76]
pH = 6.0 C26—C84 31 431.6/20.5 [26–29]-S-S-[80–85]
[26–30]-S-S-[80–85]
[26–31]-S-S-[80–85]
C40—C95 46 386.4/15.4 [40–46]-S-S-[93–97]
[40–46]-S-S-[92–97]
[40–46]-S-S-[92–98]
[38–46]-S-S-[92–97]
C58—C110 11 129.8/17.5 [52–61]-S-S-[105–115]
[47–61]-S-S-[105–115]
C65—C72 6 79.3/21.9 [62–73]*
[62–66]-S-S-[67–73]
[62–66]-S-S-[67–76]
a

Asterisk (*): peptides with intrachain disulfide bond.