UDP-glucuronyltransferase activities towards 2-aminophenol and bilirubin were studied in a total of 70 human subjects, including premature and full-term newborn babies, infants, children and adults. These two activities have been reported in rat to develop latefoetally and neonatally respectively, but in man they both develop neonatally. There is a linear relationship between the logarithm of each liver transferase activity and the logarithm of the number of days after birth during the first 3 months of life, after which each activity remains constant.
A new set of allergens from Dermatophagoides pteronyssinus and D. farinae (provisionally named DP5 and DF5, respectively) was isolated from the whole culture of mites. The apparent molecular weights of both allergens were shown to be 25,000 on SDS-PAGE under a reducing condition and 27,000 on Sephadex G-75 gel filtration chromatography. Both DP5 and DF5, as well as Der f III, possessed proteolytic activity. The results of substrate specificity and susceptibility to various protease inhibitors of DP5 and DF5 strongly suggested that they belonged to the chymotrypsin-like serine protease family. In sera from 88 mite-allergic patients, specific IgE antibodies to DP5 and/or DF5 were detected in only 41% of the sera by radio-allergosorbent test, while 90% and 93% had specific IgE antibodies to Der p I and/or Der f I and Der p II and/or Der f II, respectively.
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