in contrast , strong chemotactic migration was elicited in pmn and mo with the tripeptide n-formyl-methionyl-leucyl-phenylalanine ( fmlp ) and in t cells when complement split product c5a and leukotriene b4 ( ltb4 ) were used as chemotaxins .
C0027229
formyl-methionyl-leucyl-phenylalanine
C0008013
chemotaxins