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* values for Lys and Pro include possible hydroxylysine and hydroxyproline residues, respectively; values for Cys include cysteine residues.

1.6. PROTEIN SPECTRA (GROUP B)

A general discussion of prominent and characteristic peaks in protein spectra can be found in Part 1, Section 3.4. To aid in the evaluation of the spectra of Group B, Table 13 provides information on the amino acid composition of the various peptides and proteins analysed, whereas Table 14 lists the most prominent fragment peaks in the pyrolysis'mass spectra of a number of poly(amino acids) purchased from Sigma Chem. Corp., St. Louis, USA. To a certain extent these poly(amino acids) may be regarded as model compounds for the more complex proteins and peptides.

Table 14

Prominent fragment peaks in the pyrolysis mass spectra of poly(amino acids)3

Monomer Monomer side chain 10 most intense peaks (above m/z 18)

b MW of monomer

Monomer Monomer side chain 10 most intense peaks (above m/z 18)

b MW of monomer

Ala

ch3 -

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