the bronchoconstrictive leukotrienes ( lts ) ltc4 , ltd4 and lte4 ( cysteinyl-lts ) and the chemoattractant ltb4 were formed in chopped human lung stimulated by the calcium ionophore a23187 , or supplied with the precursor lta4 .
C0023545
leukotrienes
C0125631
lta4