The RNA-dependent RNA polymerase (replicase) of encephalomyocarditis (EMC) virus was found to be closely associated with the smooth membranes of infected BHK-21 cells. An RNA-dependent EMC replicase was extracted from the membranes with 0.15% sodium dodecyl sulfate (SDS) and 1,1,2-trichlorotrifluoroethane (Genetron 113) and further purified by high-salt dextran-polyethylene glycol phase separation, sievorptive chromatography, and glycerol gradient sedimentation. The enzyme does not manifest strict specificity toward EMC RNA template. It can use also Q,3 RNA, rRNA of BHK cells, or poly(C). SDS-polyacrylamide gel electrophoresis of purified EMC replicase labeled with radioactive methionine revealed that, of all the stable EMC proteins, the enzyme contains predominantly the 56,000-dalton (E) polypeptide.
We analysed a database of glycosylated haemoglobin (HbA1) in nondiabetic pregnant women to investigate the relation between glucose metabolism in the first and second trimesters and hypertensive complications of pregnancy. From a total of 1334 women, 13 had pre‐existing hypertension, 225 developed gestational hypertension and 51 developed pre‐eclampsia. At 28 weeks of gestation, the women who susequently developed gestational hypertension had a significantly higher mean HbAl than those who remained normotensive (6.33 vs 6.17%, P < 0.02). This difference remained significant after correcting for the effects of age and body mass index (regression coefficient 0.11, SE 0.06, P = 0.05). In contrast, there were no significant differences in HbAl between the women with pre‐eclampsia and their normotensive counterparts. This provides indirect evidence to support our hypothesis that gestational hypertension is associated with insulin resistance but pre‐eclampsia is not.
Watanabe & Williams (1951, 1953) were the first to perform biochemical studies on insect sarcosomes. Evidence was provided for the operation of the citric acid cycle in sarcosomes of the housefly
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