... Fenvalerate and its metabolite. Toxicol In Vitro. 2005;19: 449–456. 8. Fraser IM, Vessel ES. Effects of metabolites of primaquine and acetanilide on normal and glucose- 6- phosphate dehydroge-nase-deficient ... trichloroacetic acid and so-dium hydroxide were supplied by Merck Germany. 2,4–Dinitrophenylhydrazine and, Guanidine hy-drochloride were obtained from (BDH Chemical Ltd Poole UK, and Winlab, UK ... thank Dr. Gamal Ha-risa, Kayyali Chair for Pharmaceutical Industry, Col-lege of Pharmacy, King Saud University for his assis-tance. Also, Dr. Omar Abdel-Kader, SEM Unit, Zool-ogy Department,...