polypeptide


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
Related to polypeptide: Polypeptide chain

polypeptide:

see peptidepeptide,
organic compound composed of amino acids linked together chemically by peptide bonds. The peptide bond always involves a single covalent link between the α-carboxyl (oxygen-bearing carbon) of one amino acid and the amino nitrogen of a second amino acid.
..... Click the link for more information.
.

Polypeptide

 

an organic compound containing six to 80–90 amino acid residues; the upper limit corresponds to a molecular weight of about 10,000. Such polypeptides, unlike proteins, can pass through semipermeable membranes.

The simple polypeptides are crystalline substances that are readily soluble in water and have chemical properties similar to those of amino acids. The complex polypeptides are amorphous and react with water to yield colloidal solutions. Polypeptides are formed in the organism during enzymatic proteolysis (autolysis of tissue, digestion, and so on) and during biosynthesis from amino acids. Many natural polypeptides exhibit the biological activity of hormones, antibiotics, and toxins. Synthetic polypeptides serve as models in studying the structure and biological activity of proteins.

polypeptide

[¦päl·i′pep‚tīd]
(biochemistry)
A chain of amino acids linked together by peptide bonds but with a lower molecular weight than a protein; obtained by synthesis, or by partial hydrolysis of protein.
References in periodicals archive ?
Table 1: Polypeptide profile of chromium resistant cyanobacterial strains under 0g mL-1 and 50g mL-1 chromium r=reduced expression of polypeptide,d=polypeptide inhibited,m=more expression
Instead specific release factors cleave the complete polypeptide from the last polypetidly tRNA and free the ribosome components for reuse in translation.
One isolate from Bhakkar and one from Khushab were entirely different from other isolates in polypeptide numbers and molecular weights.
Remind students that the P Site is the site where the growing polypeptide chain is made.
Immunoreactivity for pancreatic polypeptide in the majority of GPs is a feature considered supportive of their pancreatic origin; however, immunoreactivity of pancreatic polypeptide is not specific for pancreatic endocrine phenotype.
This report lists Synthesis Polypeptide Drug raw materials, equipment, marketing channels, industry development trends and proposals and clients alternative products survey analysis.
With this acquisition the PolyPeptide Group will employ close to 800 people worldwide with GMP facilities in the United States (Torrance and San Diego, California), France (Strasbourg), India (Ambernath), Belgium (Braine-D'Alleud) and Sweden (Malmo).
M2 PHARMA-November 30, 2015-biOasis wins US patent for delivery of therapeutic agents across the blood-brain barrier using polypeptides from Transcend BBB delivery vector
Key words: Mycoplasma gallisepticum CRD SDS-PAGE Polypeptide and Western blot.
During various physiological processes such as protein synthesis, degradation and transport through membranes, they bind to interactive sites of polypeptides thereby preventing their improper interaction with other molecules and enabling controlled further processing of the polypeptide in question.
The C-terminal of the polypeptide ([approximately equal to] 380 aa) forms a globular head that is anchored to the viral membrane by a flexible stalk.
Bacillus thuringiensis (Bt) Cry1Ab, the protoxin sequence from Bt serovar aizawai, consists of a single 610-amino-acid polypeptide (accession no.