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Amino acid residue masses and related theoretical immonium ions
H
N
H
R
O
C
C
H
m=
1
+ S mresidues
n
OH
n
+ 17
One
letter
Code
Three-letter
code
Monoisotopic
mass
Immonium
A
Ala:
71.03711
44.0495
C
Cys
103.00919
76.0215
D
Asp
115.02694
88.0393
E
Glu
129.04259
102.0550
F
Phe
147.06841
120.0808
G
Gly
57.02146
30.0338
H
His
137.05891
110.0713
I
Ile
113.08406
86.0964
K
Lys
128.09496
101.1073
L
Leu
113.08406
86.0964
M
Met
131.04049
104.0528
N
Asn
114.04293
87.0553
P
Pro
97.05276
70.0651
Q
Gln
128.05858
101.0709
R
Arg
156.10111
129.1135
S
Ser
87.03203
60.0444
T
Thr
101.04768
74.0600
V
Val
99.06841
72.0808
W
Trp
186.07931
159.0917
Y
Tyr
163.06333
136.0757
+TOF Product (461.8): Experiment 2, 22.476 to 22.530 min from w204_Temoins_BSA_digest....
a=3.55491270775816470e-004, t0=6.56947286939503100e+001
Max. 608.5 counts.
173.13
600
550
461.8
201.13
500
(2+)
In te n s ity , c o u n ts
450
400
350
300
155.12
120.11
250
722.48
200
248.20
575.40
150
102.08
147.15
50
0
347.29
219.19
100
72.11
89.11
50
129.14
110.09
100
229.16
212.18
150
476.31
200
250
376.25
361.78
330.23
341.04 429.27
300
350
400
851.5
458.29
487.26
450
500
m/z, amu
550
558.33 675.42 687.44 704.48
600
650
700
750
833.65
800
850
+TOF Product (740.4): Experiment 2, 32.213 to 32.270 min from w203_ALBU_BOVIN_digest.wi...
a=3.55491270775816470e-004, t0=6.56947286939503100e+001
Max. 71.3 counts.
171.15
70
65
60
136.10
300.19
55
In te n s ity , c o u n ts
740.4 (2+)
Whole spectrum
50
45
40
274.21
35
30
120.10
25
102.08 187.12
20
15
143.15
387.32
265.14 350.18
10
571.41
685.50
500.36
159.11 247.13 333.19 435.23
5
526.22
193.15
554.25
72.11
339.24 475.24
0
100
200
300
400
500
600
1017.55
813.48
668.44
700
m/z, amu
960.54
796.48
800
900
1000
1180.60
1100
1200
1309.7
1300
+TOF Product (740.4): Experiment 2, 32.213 to 32.270 min from w203_ALBU_BOVIN_digest.wi...
a=3.55491270775816470e-004, t0=6.56947286939503100e+001
Max. 71.3 counts.
740.4 (2+)
171.15
70
LOW MASS REGION
65
136.10
60
300.19
In te n s ity , c o u n ts
55
50
45
175.16
40
274.21
35
30
120.10
86.13
25
102.08
187.12
20
387.32
143.15
15
265.14
10
159.11
5
72.11
0
60
87.13
80
100
221.11
130.08
182.12
120
140
160
205.12
180
200
247.13
228.16
220
257.19
304.17
290.18 315.18
240 260
m/z, amu
350.18
272.19
280
300
333.19
335.23
320
340
368.21
407.25
373.24 382.28
360
380
400
435.23
413.26
420
440
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