Dejan M. Petrović

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A wire-wrapped wooden dowel was inserted through the wall of the nest compartment of a two-compartment box. There were four conditions. Some lactating female rats were shocked by the dowel when they first touched it, and some were not, after which the dowel was either immediately withdrawn from the chamber or left in place for the duration of the ensuing(More)
Biosynthetic incorporation of tryptophan (Trp) analogues in recombinant proteins using an E. coli Trp auxotroph expression host is limited to analogues modified with a small substituent like a fluoro atom or a hydroxyl or amine group. We report here the efficient incorporation (>89 %) of chloro- and bromo atoms containing Trp analogues in alloproteins at(More)
Castrated male rats (N = 27) with medial hypothalamic lesions or sham lesions were placed on a 23-h food-deprivation schedule and adapted to a highly palatable liquid food. They were also given two tests of defensiveness toward an experimenter. All animals were then housed in medial hypothalamic lesion/sham lesion pairs and subjected to a series of 6(More)
Male hooded rats (350 to 450 g) were sham-castrated, castrated and implanted with testosterone-filled, or castrated and implanted with empty Silastic tubes. Twenty-four hours postoperatively the animals in each group were housed with a female or a male similar in size to the female. Beginning one week following surgery and continuing for three weeks(More)
Male hooded rats were castrated and implanted with testosterone-filled Silastic tubes appropriate for maintaining a normal average serum testosterone concentration. They were then given lesions of the medial accumbens nucleus or sham lesions. Twenty-four hours postoperatively each male was housed with a female. Beginning 7 days following pairing and(More)
Male hooded rats (350 to 450 g) were castrated and given subcutaneous implants of testosterone-filled or empty Silastic tubes. Four weeks later, half of the animals with testosterone implants were housed with an animal with an empty implant and left for 6 weeks. The other animals were adapted to a food-deprivation schedule, housed in(More)
Female hooded rats were ovariectomized and implanted with a single testosterone-filled Silastic tube or an empty tube. The tube size was one which allowed a release of testosterone at the high end of the mean normal serum testosterone concentration for intact females. Following a 7-day recovery period, all rats were placed on a 23-hr food-deprivation(More)
Female rats were individually housed with a single castrated male with a testosterone implant that maintained sexual and aggressive behavior. At weekly intervals, the resident male was removed and an unfamiliar female intruder was introduced into the colony. Attacks, bites, on-top, and piloerection of the resident female toward the intruder were scored.(More)
Fungi secrete a set of glycoside hydrolases and lytic polysaccharide monooxygenases (LPMOs) to degrade plant polysaccharides. Brown-rot fungi, such as Gloeophyllum trabeum, tend to have few LPMOs, and information on these enzymes is scarce. The genome of G. trabeum encodes four auxiliary activity 9 (AA9) LPMOs (GtLPMO9s), whose coding sequences were(More)
Competition for food was observed between pairs of ovariectomized female rats with medial hypothalamic lesions or sham lesions. A second series of tests observed food-competition between ovariectomized and sham-ovariectomized females. Competing pairs were continuously housed together and maintained on a 23-hr food-deprivation schedule. Competition occurred(More)