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an introduction to acyl chlorides (acid chlorides) The strong smell of ethanoyl chloride is a mixture of the smell of vinegar (ethanoic acid) and the acrid smell of hydrogen chloride gas. Acyl chlorides can't be said to dissolve in water because they react (often violently) with it. Acyl chlorides are extremely reactive, and in their reactions the chlorine atom is replaced by other things. www.chemguide.co.uk /organicprops/acylchlorides/background.html   (618 words)

Acyl - Wikipedia, the free encyclopedia In chemistry, the terms acyl or acyl group refer to a functional group obtained from an acid by removal of a hydroxyl group. Most commonly, the acyl group is derived from a carboxylic acid of the form RCOOH. Acyl groups can also be derived from other types of acids such as sulfonic acids, phosphonic acids, and some others. en.wikipedia.org /wiki/Acyl   (235 words)

Title of Invention: Fatty acyl reductase A fatty acyl reductase of this invention includes any sequence of amino acids, such as protein, polypeptide or peptide fragment, which is active in catalyzing the reduction of a fatty acyl group to the corresponding alcohol. The DNA sequence encoding an acyl reductase of this invention may be employed in conjunction with all or part of the gene sequences normally associated with the reductase. In embodiments wherein the expression of the acyl reductase protein is desired in a plant host, the use of all or part of the complete plant acyl reductase gene may be desired, namely the 5' upstream non-coding regions (promoter) together with the structural gene sequence and 3' downstream non-coding regions may be employed. www.nal.usda.gov /bic/Biotech_Patents/1995patents/05403918.html   (13277 words)

Acyl halide - Wikipedia, the free encyclopedia In chemistry, the term acyl halide (also known as acid halide) refers to a compound derived from an acid by replacing a hydroxyl group with a halide group. A common method for the synthesis of acyl halides in the laboratory is by reaction of carboxylic acids with reagents such as thionyl chloride and phosphorus pentachloride for acyl halides, phosphorus tribromide for acyl bromides and cyanuric fluoride for acyl fluorides Acyl halides are artificial (meaning not found in nature), rather reactive compounds often synthesized to be used as intermediates in the synthesis of other organic compounds. en.wikipedia.org /wiki/Acyl_halide   (510 words)

Carboxylic Acids   (Site not responding. Last check: 2007-09-07) The Acyl Halide Family is a family of organic compounds with the functional group being the -COX. Acyl Halides cannot be prepared from one of the members of the other acyl families because they represent the most reactive of the families. Acyl halides will react with water as a nucleophile to form the Carboxylic acid and a strong Hydrogen Halide whish will react with water itself to form a corrosive strong acid which can be very irritating to the eyes and skin. members.aol.com /profchm/acylhal.html   (1220 words)

Title of Invention: Fatty acyl reductases By fatty acyl group is intended any fatty acyl group, either free or covalently bound to a carrier, such as ACP or coenzyme A. Other enzymes may or may not be required for the reduction of the fatty acyl group to the alcohol, as this enzymatic reaction requires two reduction steps. Further characterization of the acyl reductase activity of a candidate reductase in the microsomal membrane preparation may be facilitated by developing an optimized specific assay for acyl reductase. As the acyl reductase is a membrane bound protein, it may be desirable to express a candidate protein in a plant cell in order to verify the activity. www.nal.usda.gov /bic/Biotech_Patents/1995patents/05411879.html   (14600 words)

Acyl Families and Nucleophilic Reactions Acyl Families are families that have the acyl group as a part of their structure. The factor that decides whether the acyl compound will undergo addition or substitution largely depends upon the ability for the "Y" group attached to the acyl carbon to be displaced by the incoming nucleophile. acyl halides are more reactive than acyl anhydrides which in turn are more reactive than carboxylic acids which are more reactive than esters which are more reactive than amides. members.aol.com /logan20/nucleo.html   (789 words)

EPA: Federal Register: N-Acyl sarcosines and Sodium N-acyl sarcosinates; Tolerance Exemption Section 408(b)(2)(B) requires EPA to give special consideration to exposure of infants and children to the pesticide chemical residue in establishing an exemption and to ``ensure that there is a reasonable certainty that no harm will result to infants and children from aggregate exposure to the pesticide chemical residue.'' II. Risk Assessment and Statutory Findings N-acyl sarcosines and sodium N-acyl sarcosinates form a large class of chemical compounds where the acyl group is derived from fatty acids such as lauric, oleic and stearic acid and/or derived from the combined fatty acids of coconut oil. Margins of safety are incorporated into EPA risk assessments either directly through the use of margin of exposure analysis or through using uncertainty factors (safety) in calculating a dose level that poses no appreciable risk to humans. www.epa.gov /fedrgstr/EPA-PEST/1999/July/Day-07/p16933.htm   (1766 words)

Fatty acid metabolism - Wikipedia, the free encyclopedia (via CobWeb/3.1 planet03.csc.ncsu.edu)   (Site not responding. Last check: 2007-09-07) Acyl CoA is conjugated to carnitine by carnitine palmitoyltransferase I Acyl carnitine is converted to acyl CoA by carnitine palmitoyltransferase II edit] β-Oxidation Whatever the conformation of the hydrocarbon chain, β-oxidation occurs normally until the acyl CoA (because of the presence of a double bond) is not an appropriate substrate for acyl CoA dehydrogenase, or enoyl CoA hydratase. en.wikipedia.org.cob-web.org:8888 /wiki/Fatty_acid_metabolism   (1542 words)

NMR Spectroscopic and Theoretical Chemistry Studies on the Internal Acyl Migration Reactions of the ...   (Site not responding. Last check: 2007-09-07) NMR Spectroscopic and Theoretical Chemistry Studies on the Internal Acyl Migration Reactions of the 1-O-Acyl--D-glucopyranuronate Conjugates of 2-, 3-, and 4-(Trifluoromethyl)benzoic Acids The slow internal acyl migration rate of the 2-TFMBA isomer was also partly attributed to the high degree of steric hindrance of the trifluoromethyl group obstructing attack by the glucuronic acid 2-hydroxy group on the carbonyl carbon to form the ortho-acid ester intermediate. This work gives insight into the molecular physicochemical properties that influence the acyl migration kinetics of simple model drug glucuronides and is of potential importance in understanding more complex drug glucuronide acyl migration reactions of toxicological interest. pubs.acs.org /cgi-bin/abstract.cgi/crtoec/1996/9/i08/abs/tx960047r.html   (408 words)

{beta}-Ketoacyl acyl carrier protein reductase (FabG) activity of the fatty acid biosynthetic pathway is a determining ... {beta}-Ketoacyl acyl carrier protein reductase (FabG) activity of the fatty acid biosynthetic pathway is a determining factor of 3-oxo-homoserine lactone acyl chain lengths -- Hoang et al. ß-Ketoacyl acyl carrier protein reductase (FabG) activity of the fatty acid biosynthetic pathway is a determining factor of 3-oxo-homoserine lactone acyl chain lengths The subsequent dehydration step is catalysed by either FabA or FabZ, depending on the lengths of the acyl groups in the ß-hydroxyacyl-ACP substrates. mic.sgmjournals.org /cgi/content/full/148/12/3849   (3457 words)

Phospholipid:diacylglycerol acyltransferase: An enzyme that catalyzes the acyl-CoA-independent formation of ... The substrate specificity of yeast PDAT was further analyzed with respect to the head group of the acyl donor, the acyl group acyl transfer is strongly dependent on the properties of the substrate as acyl donors in the synthesis of TAG by PDAT. www.pnas.org /cgi/content/full/97/12/6487   (5751 words)

acyl - definition of acyl in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and ...   (Site not responding. Last check: 2007-09-07) acyl - definition of acyl in the Medical dictionary - by the Free Online Medical Dictionary, Thesaurus and Encyclopedia. A organic radical having the general formula RCO, derived from the removal of a hydroxyl group from an organic acid. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. medical-dictionary.thefreedictionary.com.cob-web.org:8888 /acyl   (91 words)

Medium Chain Acyl CoA Dehydrogenase Deficiency However, in some rare cases, symptoms may not become apparent until later in childhood. Symptoms of the following disorders are similar to those of Medium-Chain Acyl CoA Dehydrogenase Deficiency. NEONATAL SYMPTOMS IN MEDIUM-CHAIN ACYL COENZYME A DEHYDROGENASE DEFICIENCY. hw.healthdialog.com /kbase/nord/nord585.htm   (3112 words)

Expression in yeast and tobacco of plant cDNAs encoding acyl CoA:diacylglycerol acyltransferase -- Bouvier-Navé ... Expression in yeast and tobacco of plant cDNAs encoding acyl CoA:diacylglycerol acyltransferase -- Bouvier-Navé et al. Expression in yeast and tobacco of plant cDNAs encoding acyl CoA:diacylglycerol acyltransferase Their deduced amino acid sequences were then shown to have 40 content.febsjournal.org /cgi/content/abstract/267/1/85   (781 words)

Very Long Chain Acyl CoA Dehydrogenase Deficiency (LCAD) It is possible that the main title of the report Very Long Chain Acyl CoA Dehydrogenase Deficiency (LCAD) is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report. The information provided in this report is not intended for diagnostic purposes. www.webmd.com /hw/raising_a_family/nord1053.asp   (576 words)

Chapter 20: Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Chapter 20: Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution they share a common reactivity pathway with nucleophiles: nucleophilic acyl substitution. The most important things to know about carboxylic acid derivatives are: library.tedankara.k12.tr /carey/ch20-0.html   (140 words)

Expression of Lauroyl—Acyl Carrier Protein Thioesterase in Brassica napus Seeds Induces Pathways for Both Fatty Acid ... The intermediates of fatty acid biosynthesis are acyl chains reflects the relative rates of synthesis and turnover of acyl Post-Beittenmiller, D., Jaworski, J.G., and Ohlrogge, J.B. (1991) In vivo pools of free and acylated acyl carrier proteins in spinach: Evidence for sites of regulation of fatty-acid biosynthesis. www.plantcell.org /cgi/content/full/10/4/613   (5044 words)

Pfam 20.0 : Acyl-ACP_TE   (Site not responding. Last check: 2007-09-07) This family consists of various acyl-acyl carrier protein (ACP) thioesterases (TE) these terminate fatty acyl group extension via hydrolysing an acyl group on a fatty acid [1]. It consists of various acyl-acyl carrier protein (ACP) thioesterases (TE) which terminate fatty acyl group extension via hydrolyzing an acyl group on a fatty acid PUBMED:7479856. Mayer KM, Shanklin J; J Biol Chem 2004; [Epub ahead of print] pfam.wustl.edu /cgi-bin/getdesc?name=Acyl-ACP_TE   (145 words)

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