Peptides (from the Greek πεπτος, "digestable"), are the family of molecules formed from the linking, in a defined order, of various amino acids.
Peptides (from the Greek πεπÏ"ίδια, "small digestibles") are short polymers formed from the linking, in a defined order, of α-amino acids. The link between one amino acid residue and the next is known as an amide bond or a peptide bond.
Peptide
(Science: biochemistry) A compound of two or more amino acids where the alpha carboxyl group of one is bound to the alpha amino group of another.
Peptide
A peptide is one or more amino acids linked by chemical bonds. The term also refers to the type of chemical bond that joins the amino acids together. A series of linked amino acids is a polypeptide.
polypeptide
a molecule consisting of many joined amino acids, but not as complex as a protein
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Chapter 19
Translocation of the cell-penetrating Tat peptide across artificial bilayers and into living cells
Paul Curnow1,3, Harry Mellor, David J. Stephens, Mark Lorch2 and Paula J. Booth3 ...
Peptides and Amines
Peptides are short chains of amino acids; most hormones are peptides. They are secreted by the pituitary, parathyroid, heart, stomach, liver, and kidneys.
peptide bond A covalent bond that links two amino acids together to form a polypeptide chain. A covalent bond between the amine end of one amino acid and the acid end of another amino acid. PICTURE
peptides Short chains of amino acids.
peptide bond
[Gk. pepto, to soften, digest]
The covalent bond between two amino acid units, formed by condensation synthesis.
peptidoglycan ...
Peptides A selection of 8 of the 40 or more peptides that are suspected to serve as neurotransmitters in the brain. The first five also serve as hormones.
Peptide Bond a bond‚ formed by dehydration synthesis‚ between the amino group of one amino acid and the carboxylic acid group of another amino acid
(pepti = digested‚ cooked) ...
Peptide Two or more amino acids joined by a bond called a "peptide bond."
See also: polypeptide
Phage A virus for which the natural host is a bacterial cell.
Peptide Two or more amino acids joined by peptide bonds.
Peptidoglycan A macromolecule that consists of linear polysaccharides cross-linked by short peptides; often found in bacterial cell walls, ...
Polypeptide: A molecule made up of a stri ng of amino acids. A protein is an example of a polypeptide.
Proteins: The active molecules in all cells. Proteins control biochemical reactions and determine the physical structure of organisms.
Polypeptide chain The chain of aminoacids joined by peptide bonds which is the primary product of the translation of the mRNA of a gene.
Polyploid Having more than the normal two haploid sets of chromosomes.
Polypeptide (protein). A polymer composed of multiple amino acid units linked by peptide bonds.
Polyploid. A multiple of the haploid chromosome number that results from chromosome replication without nuclear division.
Peptide
Two or more amino acids joined by a peptide bond.
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Peptide containing more than approximately 20 'peptide linked' amino acid residues.
Peptide
Two or more amino acids joined by a peptide bond.
Ribosome
The term proposed by Roberts (1958)for the small cellular components (Gk. soma, body) composed of specialized ribosomal RNA and protein (ribonucleoprotein); ...
Peptide bond
- A covalent bond formed between the amino group of one amino acid and the COOH group of another, with the elimination of water
Perennial Ryegrass ...
Peptides. Chains of amino acids; often portions of a protein molecule
pH. Measure of he acidity or basicity of water (-log10 of the activity of hydrogen ions in water) ...
peptide bond. A bond that binds amino acids together into a polypeptide chain, formed by removing an OH from the carboxyl group of one amino acid and an H from the amino group of another to form an amide group _CO_NH_.
A peptide hormone secreted by the islets of Langerhans of the pancreas that regulates the level of sugar in the blood.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Polypeptide is the name given to a chain of amino acids synthesized from one mRNA. The term polypeptide refers to the fact that amino acids are linked by what is called a peptide bond and, of course, poly means many.
A polypeptide 10 amino acids long is split into various smaller fragments, and the amino acid sequences of some of the fragments are determined.
protein - polypeptide chain which serves a structural or enzymatic role or other role in the cell.
replicated chromosomes - chromosomes which have undergone DNA replication and contain two sister chromatids.
A polypeptide secreted by bacteria which inhibit or prevent the growth of related bacteria which lack the corresponding colicin immunity proteins. Colicins are encoded by a group of naturally occurring plasmids first found in E. coli (e.g.
A DNA sequence that codes for a specific polypeptide; a gene. See DNA, Gene. Clone. An exact genetic replica of a specific gene or an entire organism. See Cloning. Cloning.
Amino acid sequence -- the linear order of the amino acids in a protein or peptide.
DNA and peptide sequences for various opsins have been determined. In 1990, all of the then known amino acid sequences were compared in order to infer a phylogeny for the opsin molecules.
Back translation Use of the experimentally determined amino acid sequence of part or all of a polypeptide to determine the theoretical nucleic acid base sequence(s) which could code for it. This is normally done using a computer programme.
As illustrated in Figure 1, intermediate filament monomer peptides are an elongated fibrous class of proteins with a central alpha-helical region capped with globular ends at both the amino and carboxylic acid termini.
While determining the polypeptide sequence resulting from gene translation is straightforward, determining the actual three-dimensional (3D) structure requires some sophisticated experimental techniques.
When viral RNA is translated into a polypeptide sequence, that sequence is assembled in a long chain that includes several individual proteins (reverse transcriptase, protease, integrase).
In classical MHC loci, in the peptide binding regions (allele-specific sequences) because of heterozygote advantage/frequency-dependent selection, ...
The oxygen or nitrogen atoms of the peptide bond are capable of hydrogen- bonding with hydrogen atoms elsewhere on the molecule. This bonding produces two common kinds of shapes seen in protein molecules, coils (helices) and pleated sheets.
A library of proteins (e.g., peptides, antibodies, purified proteins, or unknown protein samples) is spotted on microscopic slides. They are usually used to identify novel proteins or protein-protein interactions.
Related
Microarray ...
"Blueprint" for protein synthesis that is transcribed from one strand of the DNA (gene) and which is translated at the ribosome into a polypeptide sequence.
proteases - enzymes, such as trypsin, that degrades proteins by hydrolyzing some of their peptide bonds.
protein kinases - Enzyme that transfers the terminal phosphate group of ATP to a specific amino acid of a target protein ...
There are 20 amino acids in nature from which all proteins are built. Polymers constructed by two or more amino acids, joined by peptide bonds, are called polypeptides.
translation - process whereby mRNA code is used by the ribosome to synthesize a polypeptide chain (protein) from amino acid precursors.
transposable element - see transposon ...
 See also: Protein, Proteins, Trans, Molecule, Cells
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