Comparative inhibition of tetrameric carbonyl reductase activity in pig heart cytosol by alkyl 4-pyridyl ketones
摘要:
Context and objective: The present study is to elucidate the comparative inhibition of tetrameric carbonyl reductase (TCBR) activity by alkyl 4-pyridyl ketones, and to characterize its substrate-binding domain.Materials and methods: The inhibitory effects of alkyl 4-pyridyl ketones on the stereoselective reduction of 4-benzoylpyridine (4-BP) catalyzed by TCBR were examined in the cytosolic fraction of pig heart.Results: Of alkyl 4-pyridyl ketones, 4-hexanoylpyridine, which has a straight-chain alkyl group of five carbon atoms, inhibited most potently TCBR activity and was a competitive inhibitor. Furthermore, cyclohexyl pentyl ketone, which is substituted by cyclohexyl group instead of phenyl group of hexanophenone, had much lower ability to be reduced than hexanophenone.Discussion and conclusion: These results suggest that in addition to a hydrophobic cleft corresponding to a straight-chain alkyl group of five carbon atoms, a hydrophobic pocket with affinity for an aromatic group is located in the substrate-binding domain of TCBR.
Novel Syntheses of Secondary and Tertiary Alcohols from Alkynes via the Hydroboration Reaction
作者:George ZWEIFEL、Richard P. FISHER
DOI:10.1055/s-1974-23307
日期:——
PARTICLES HAVING HYDROPHOBIC MATERIAL THEREIN
申请人:AUSTRALIAN NUCLEAR SCIENCE AND
TECHNOLOGY ORGANISATION
公开号:EP1906915A1
公开(公告)日:2008-04-09
Solution for immersion exposure and immersion exposure method
申请人:Kagayama Akifumi
公开号:US20090130604A1
公开(公告)日:2009-05-21
The object is to resolve a finer pattern with a narrower line/space width by immersion lithography technology in the manufacture of a semiconductor or the like. A liquid for use in immersion exposure includes a saturated hydrocarbon compound as a main component, wherein the content of an impurity or impurities having an unsaturated bond or a heteroatom in its structure is respectively as follows: (i) 2 μg/mL or less in total for a compound having a conjugated unsaturated bond; (ii) 30 μg/mL or less in total for a compound having no conjugated unsaturated bond but having a non-conjugated unsaturated bond; (iii) 15 μg/mL or less in total for amines having no unsaturated bond; and (iv) 100 μg/mL or less in total for a heterocyclic compound, alcohols, ethers and a halogen-containing compound, other than above compounds (i) to (iii).