leukotriene ( lt ) a4 , b4 , c4 , d4 and e4 were incubated for various periods of time ( 0-180 min ) at 37 degrees with guinea-pig lung homogenates ( 20,000 x g ; 15 min ) and the remaining biological activity was assayed either on guinea-pig ileum longitudinal smooth muscles ( for lta4 , ltc4 , ltd4 and lte4 ) or on guinea-pig lung parenchymal strips ( for ltb4 and on some occasions lta4 ) in a cascade superfusion system .
C0024109
lung
C0819757
lung parenchymal