“…05-2. 08 /~, (Gitany & McEwen, 1975;Sorensen,1977;Kutschabsky, Messerschmidt & Sohr, 1979;Donohue & Mandel, 1981). The length of the S-P bond in WR2721 may be a factor in the ease of hydrolysis of this bond in vitro (half-life of 38 min at 37 ° C in 42.5 mM acetate buffer at pH 4.0) (Risley, Van Etten, Shaw & Bonner, 1986) and in vivo (Utley, Seaver, Newton & Fahey, 1984;Swynnerton, Huelle, Mangold & Ludden, 1986).…”