model oligopeptides containing 10 or 20 alanine residues were synthesized by automated solid phase methods using a variety of protocols , and the levels of deletion and insertion peptides were measured by the 252cf fission fragment ionization time-of-flight spectrometric technique in which the total , unfractionated , synthetic product was deposited on a film of nitrocellulose and analyzed .
C0028954
oligopeptides
C0030956
peptides