they were found to localize with great specificity at skin sites injected intradermally with zymosan-activated plasma , synthetic chemotactic peptides ( e.g. , n-formyl methionyl leucyl phenylalanine ) , escherichia coli-derived chemotactic factors , or whole e. coli .
C0027229
n-formyl methionyl leucyl phenylalanine
C0008013
chemotactic factors