the patient 's serum , however , did inhibit the chemotactic activity of normal zts and of column-purified c5-derived peptide ( s ) , but had no effect on the chemotactic activity of either the synthetic peptide , n-formylmethionyl leucyl-phenylalanine or a filtrate prepared from a culture of escherichia coli ( bacterial chemotactic factor ) .
C0027229
n-formylmethionyl leucyl-phenylalanine
C0008013
chemotactic