Important

1. Dicarboxylic acids, compounds that contain two carboxyl groups, are important in a number of industrial processes.

Reduction

1. Reduction of the carboxyl groups of compound XIII to methanol to yield compound XIV was carried out with Vitride reducing agent with yields over 95%.

Polyamino Carboxylic

1. A polyamino carboxylic acid (complexone) is a compound containing one or more nitrogen atoms connected through carbon atoms to one or more carboxyl groups.

Esterification

1. An important reaction of the carboxyl group is esterification, whose mechanism is shown in the figure.

Aryl Group

1. It is the simplest aromatic carboxylic acid (see aryl group and carboxyl group).

Free Carboxyl End

1. Carboxypeptidase acts on peptides from the free carboxyl end; aminopeptidases from the free amino end.

Surface Functional Groups

1. Considering this parameter, the surface functional groups were divided into carboxyl, lactone and phenol.
2. By heating activated carbon to a temperature higher than 400° C., the surface functional groups and particularly the carboxyl group are effectively removed.

Carboxyl Group -Cooh

1. The most common organic acids are the carboxylic acids whose acidity is associated with their carboxyl group -COOH.

C-Terminal Carboxyl Groups

1. A similar oxidative decarboxylation also takes place for amino acids with C-terminal carboxyl groups.

Carboxyl Termini

1. The invention also provides polypeptides having one or more amino acids deleted from both the amino and the carboxyl termini as described below.
2. Peptides derived from the carboxyl termini of human Rheb and Rheb2 are in vitro substrates for farnesyl transferase but not geranylgeranyl transferase-1.

Carboxyl Side

1. It is selective for peptide bonds with aromatic or large hydrophobic side chains on the carboxyl side of this bond.

Functional Group Consisting

1. A carboxyl or carboxylic group is a functional group consisting of a carbon atom and an oxygen atom doubly bonded to each other.
2. A carboxyl group is a functional group consisting of a carbonyl and a hydroxyl, which has the formula -C OH, usually written as -COOH or -CO2H.

Ester Group

1. Under the conditions of the Hofmann rearrangement, a carboxylic acid ester group is usually saponified to the carboxyl group.
2. As the radical initiator, azo initiators are preferred, with azo initiators having an ester group, a cyano group or a carboxyl group being more preferred.

Carboxyl End

1. Amino acids are linked together by joining the amino end of one molecule to the carboxyl end of another.

Biotin Carboxyl Carrier

1. Reaction (1) is catalyzed by biotin carboxylase (BC); reaction (2) by transcarboxylase (TC); BCCP=biotin carboxyl carrier protein.

Peptide Bond

1. Amino acids are linked together in proteins by a peptide bond, made by the reaction of the carboxyl group of one amino acid with the amino group of the next.
2. Because of the resonance structure of the electron orbitals on the amino and carboxyl groups, the peptide bond is planar.

Organic Acids

1. All organic acids contain the carboxyl group,-COOH, as their functional group.

Free Carboxyl Groups

1. Acidic esters are those in which some of the carboxylic acid functions in the acylating reagents are not esterified but are present as free carboxyl groups.

Free Carboxyl Group

1. On one end of a protein, therefore, there is a free amino group called the N-terminus, and on the other end is a free carboxyl group, called the C-terminus.
2. The free carboxyl group is acidic in nature.

Acidic Carboxyl Groups

1. Amino acids are chemical compounds, which contain both basic amino groups and acidic carboxyl groups.

Activated Carboxyl Group

1. The choice of activated carboxyl group or coupling agent can be very important in peptide synthesis, as using the wrong one can lead to racemization.
2. Use is generally made of at least 1 molar equivalent of reagent per functional group capable of reacting with the activated carboxyl group.
3. For example, there is a problem of a reduction in reaction efficiency due to hydrolysis of an activated carboxyl group.

Sequence

1. The amino acid sequence is created through the bonding of the carboxyl group of one amino acid with the amino group of another.
2. The sequence of a protein begins with the amino of the first amino acid and continues to the carboxyl end of the last amino acid.

Stronger

1. However, the carboxyl group is a far stronger acid than the amino group.

Alpha

1. In the alpha amino acids, the amino and carboxyl groups are attached to the same carbon, which is called the.alpha.-carbon.

Consisting

1. To do this, it removes a molecular structure called a carboxyl group, consisting of a carbon atom, two oxygen atoms, and a hydrogen atom.

Phosphate

1. The protein is usually linked to an ethanolamine residue at the free carboxyl end, and this is in turn linked via phosphate to a terminal mannose unit.

Charge

1. When deprotonated the amino group has no charge, while the carboxyl group has a -1 charge.

Basic

1. The amino group (-NH 2) is basic and the carboxyl group (-COOH) is acidic in nature.

Drugs

1. Most of the drugs, due to acidic carboxyl group are metabolized by the mammals via conjugation.

Cooh

1. Amino acids contain a basic amino group (NH 2) and an acidic carboxyl group (COOH), both attached to the same carbon atom.
2. CARBOXYLIC ACIDS carboxylic acids An organic compound containing, the carboxyl group (COOH) is known as carboxylic acid and they possess acidic properties.
3. The amine group, ND, is slightly basic; the carboxyl group, COOH, is a mild acid.

Formula

1. Salicylic acid has the formula C 6 H 4(OH)COOH, where the OH group is ortho to the carboxyl group.
2. The formula for the carboxyl functional group is RCOOH. It is based on carboxylic acid.
3. An electroconductive carboxylic acid functionalized monomer corresponding to Formula (I), wherein A represents a hydrogen or a carboxyl group.

Etc

1. Carboxyl group is particularly preferred in view of the transmittance of light (193 nm), storage stability, etc.

Examples

1. Examples of non-NCO functional groups include carboxyl, epoxy, hydroxyl, amino.
2. Herein, examples of the group derived from a carboxyl group include an amido group (—CONHR), an ester group (—COOR) and the like.

Oxidation

1. Fumarylacetate is created maleylacetoacetate- cis - trans -isomerase through rotation of the carboxyl group created from the hydroxyl group via oxidation.

Saturated

1. Monoesterification at the saturated acid has been attributed to the mesomeric effect of the carboxyl with the double bond in the aryl ring 20.
2. If the carbon atom to which the carboxyl group is attached is saturated and is in a ring, the acid is cycloaliphatic.

Radical

1. Compounds wherein the acid radical contains more than one carboxyl group, at least one of which is esterified.

Methyl

1. Suitable protecting groups for this carboxyl group are well known in the art and include such groups as methyl, butyl, benzyl esters, or amides and the like.

Chain

1. Organic acids have a carboxyl group and long a chain of carbons attached to it.
2. The carboxyl groups of the backbone hydrogen bond to the amino group of a residue four amino acids distant along the chain.

Nitro

1. The aryl group may also be substituted with halogen atoms, or other groups such as nitro, carboxyl, alkoxy, phenoxy, and the like.

Polymers

1. Complete succinylation of the polymers is confirmed by a negative reaction for hydroxyl and a positive reaction for carboxyl groups.

Polymer

1. The content of carboxyl groups, related to the polymer to be crosslinked, preferably lies in the range from 0.001 to 30.0 wt.

Groupings

1. This group is called a carboxyl group and is written as (COOH). Between these two groupings are atoms and bonds unique to each amino acid.

Side Chains

1. Acidic amino acids have side chains that contain a carboxyl group.

Hydrophobic

1. Some have an additional amino or carboxyl group, and others have water-repelling (hydrophobic) groups.

Substitution

1. The remaining examples below consider the nucleophilic (carboxyl) substitution on phenylesters, with phenolate as the leaving group.
2. The mechanism is an acid promoted acyl substitution, which results in the substitution of an alkoxy group for the hydroxyl portion of the carboxyl group.

Organic

1. Further, even for the organic acids, an organic acid having a carboxyl group is most preferred.
2. An organic acid that contains one or more carboxyl groups.

Categories

1. Encyclopedia of Keywords > Nature > Chemistry > Carboxyl Group
2. Amino Group
3. Functional Group
4. Carbon Atom
5. Nature > Chemistry > Biochemistry > Amino Acids

Related Keywords

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