. 1998 Jul 21;95(15):8596–8601. doi: 10.1073/pnas.95.15.8596

Table 3.

Mass differences between peptides released by trypsin treatment of wild type and mutants of TMV coat proteins

Virus	Peptide	m/z (monoisotopic)		Error, ppm	Difference in mass between mutant and wild type, Da
Virus	Peptide	Observed	Theoretical	Error, ppm	Difference in mass between mutant and wild type, Da
TMV-U1	47–61	1770.9183	1770.9178	0.3^*	—
TMV-Glu50Gln	47–61	1769.9361	1769.9338	1.3^*	−1
TMV-Glu50Met	47–61	1772.9204	1772.9157	2.7^*	+2
TMV-U1	72–90	2049.0962	2049.1020	2.8^†	—
TMV-Asp77Asn	72–90	2048.1255	2048.1180	3.7^†	−1
TMV-Asp77Arg	72–90	2090.1674	2090.1763	4.3^†	+41

Internal calibration.

^†

External calibration.