Abstract:
This invention relates to insecticidally effective peptides isolated from the spider, Segestria sp., characterized by their paralytic effect on insect pests and low mammalian toxicity. This invention also discloses the cDNA sequences of the peptides, methods for producing recombinant peptides, and methods of utilizing these peptides as insectidical agents.
Abstract:
A process for preparing an R enantiomer of a compound of formula (I) wherein Me is methyl, Ar is 3-methoxyphenyl, 3-chlorophenyl, or 1-naphthyl, and X is independently selected from the group consisting of H, F, Cl, Br, I, phenyl, CF3, CF2H, CFH2, lower alkyl (e.g., Me), O-lower alkyl (e.g., OMe), OCH2CF3, OH, CN, NO2, C(O)-lower alkyl (e.g., C(O)Me), C(O)O-lower alkyl (e.g., C(O)OMe), C(O)NH-lower alkyl (e.g., C(O)NH-Me), C(O)N-lower alkyl2 (e.g., C(O)NMe2), OC(O)-lower alkyl (e.g., OC(O)Me), and NH-C(O)-lower alkyl (e.g., NH-C(O)Me), where "lower alkyl" is selected from a group consisting of 1 to 6 carbon atoms, and m is an integer between 1 and 5, by asymmetrically and enantioselectively reducing an imine with a reducing agent/chiral auxiliary agent complex so as to produce an enantiomeric excess of R enantiomer of the compound of formula (I) over the S enantiomer of the compound of formula (I). The process is especially useful to produce compounds (R)-(+)-N-[1-(3-methoxyphenyl)ethyl]-3-(2-chlorophenyl)propanamine and (R)-(+)-N-[1-(3-methoxyphenyl)ethyl]-3-(phenyl)propanamine. Enantiomeric excess of the R enantiomer over S enantiomer of greater than 65 % have been achieved.
Abstract:
A fluorescence analysis system detects light transmitted from wells in a sample plate. One embodiment of the system includes a single light detector. A reflector is capable of receiving light from any one of several detection emitters and of reflecting the light toward the light detector. One reflector includes a prism which is mounted on a stepping motor. The prism is selectively rotated so that it faces each detection emitter in turn. The light from several wells in a row is directed toward the light emitter by rotating the prism to face, one-by-one, each of the emitters corresponding to the wells. The detection emitters include one end of an optical fiber bundle. The other end of each bundle is positioned near the wells, with each bundle positioned by a different well to carry light from that well to the corresponding emitter. A collimating lens is positioned between each detection emitter and the rotating prism to focus light from the emitter onto the prism. A baffle is positioned between the light detector and the prism. Light from a xenon arc excitation lamp is carried by optical fiber bundles toward the sample wells. A computerized controller coordinates light detection with the activities of an automated liquid handling system.
Abstract:
The present invention features compounds of general formulae a), b), c), able to modulate one or more activities of an inorganic ion receptor and methods for treating diseases or disorders by modulating inorganic ion receptor activity. Preferably, the compound can mimic or block the effect of extracellular Ca2+¿ on a calcium receptor.
Abstract:
The present invention concerns compounds and methods for modulating metabotropic glutamate receptor activity. The compounds are targeted to a binding site on the metabotropic glutamate receptor which appears to be distinct from the glutamate receptor binding site. The preferred use of the compounds and methods of the present invention is to modulate metabotropic glutamate receptor activity and thereby aid in the treatment of neurological diseases or disorders. The compounds can also be used to produce other effects such as an analgesic effect, cognition-enhancement effect, and a muscle-relaxant effect.
Abstract:
Polypeptides isolated from the venom of the Geolycosa riogrande spider form pores in the plasma membrane of cells and are effective in mobilizing intracellular calcium ions in cells. These polypeptides are useful in such areas as drug delivery, cancer chemotherapy and immunotherapy, as well as in the physiological study of cells.
Abstract translation:从水Geo osa de蜘蛛毒液中分离出的多肽在细胞质膜中形成孔隙,有效调动细胞内的细胞内钙离子。 这些多肽可用于药物递送,癌症化疗和免疫治疗以及细胞生理学研究等领域。
Abstract:
The present invention features molecules with general structure (I) or (II) which can modulate on or activities of an inorganic ion receptor. Preferably, the molecule can mimic or block the effect of extracellular Ca on a calcium receptor. The preferred use of such molecules is to treat diseases or disorders by altering inorganic ion receptor activity, preferably calcium receptor activity.
Abstract:
Polypeptides isolated from the venom of the Theraphosidae aphonopelma spider block calcium channels in cells of various organisms and are useful in blocking said calcium channels in cells, per se, in the treatment of calcium channel-mediated diseases and conditions and in the control of invertebrate pests.