For reporter ion quantification, a quantification channel is one of several masses, states, or tags (depending on which quantification method you use) for which you measure a quantification value. The application calculates the reported quantification ratios from the quantification values of the different quantification channels.

For example, for iTRAQ 4plex, the four different reporter tags (114, 115, 116, and 117) are the four quantification channels of the iTRAQ 4plex method. The application calculates the ratios from the detected quantification values of the four quantification channels.

The following table lists the masses of the reporter ions of the tags available in the different TMT kits. The masses for the original TMT reagents, which are no longer available, are included for reference.

TMT channel name and label

Tag

Mass

TMT 2plex

 

Iodo TMT 6plex

TMT 10plex

TMT 11plex

TMT 16plex

TMT 18plex

126

126.12773

126

126

126

126

126

126

126

127_N

127.12476

 

127

127

127_N

127_N

127_N

127_N

127_C

127.13108

127

 

 

127_C

127_C

127_C

127_C

128_N

128.12812

 

 

 

128_N

128_N

128_N

128_N

128_C

128.13444

 

128

128

128_C

128_C

128_C

128_C

129_N

129.13147

 

129

129

129_N

129_N

129_N

129_N

129_C

129.13779

 

 

 

129_C

129_C

129_C

129_C

130_N

130.13483

 

 

 

130_N

130_N

130_N

130_N

130_C

130.14115

 

130

130

130_C

130_C

130_C

130_C

131_N

131.13818

 

131

131

131

131_N

131_N

131_N

131_C

131.4450

 

 

 

 

131_C

131_C

131_C

132_N

132.14154

 

 

 

 

 

132_N

132_N

132_C

132.14786

 

 

 

 

 

132_C

132_C

133_N

133.14489

 

 

 

 

 

133_N

133_N

133_C

133.15121

 

 

 

 

 

133_C

133_C

134_N

134.14825

 

 

 

 

 

134_N

134_N

134_C

134.154565

 

 

 

 

 

 

134_C

135_N

135.1516

 

 

 

 

 

 

135_N