Abstract
The effect of 1,1,1-trichloro-2,2-di-(p-chlorophenyl)ethane (DDT) and its analogues on the adenosine triphosphate-p32 exchange reaction in mosquito sarcosomes has been compared. All analogues of DDT tested inhibited the exchange reaction by nearly the same extent when their concentration in the particles reached the same level. No correlation was found between the toxicity for mosquito larvae of the compounds tested and their effect in vitro on the exchange reaction.