Amino glutamine

Correct answer = C. Glutamine contains two titrat able groups, a-carboxyl and a-amino. Glutamine is a polar, neutral amino acid that shows little electrophoretic migration at pH 7.0. The symbol for glutamine is "Q."... 

Pentanamide, /V-ethyl-H3C-(CH2)3-C0-NH-C2H5 1,5-Pentanediamide, 2-amino- glutamine amide H2N-0C-(CH2) 2-CH(NH2)-C0-NH2 1587, 4249 826a, 2914 ... 

Theanine and Other Amino Acids. Amino acids (qv) make up 4—8% of the soluble soHds found in brewed tea. There is an amino acid unique to tea, y-A/-ethyl glutamine, called theanine [3081-61-6] (7) (23). 

L-alanyl-L-2,3-epoxy-4-oxohexahydrophenylalanine [29393-20-2] C22H2gN20, inhibit glutamine metaboHsm, as does bialaphos as a source of the amino acid L-phosphinothricin [35597-44-5] 0 11 2 04 . 

A hybridoma can live indefinitely in a growth medium that includes salts, glucose, glutamine, certain amino acids, and bovine serum that provides essential components that have not been identified. Serum is expensive, and its cost largely determines the economic feasibihty of a particular ciilture system. Only recently have substitutes or partial replacements for serum been found. Antibiotics are often included to prevent infection of the culture. The pH, temperature and dissolved oxygen, and carbon dioxide concentration must be closely controlled. The salt determines the osmotic pressure to preserve the integrity of the fragile cell. 

Automated amino acid analysis of peptides containing asparagine (Asn) and glutamine (Gin) residues gives a peak corresponding to ammonia. Why ... 

It is a peptide containing 27 amino acid residues containing the amino acids L-histidine (His) L-aspartic acid (Asp) L-serine (Ser) glycine (Gly) L-threonine (Thr) L-phenyl-alanine (Phe) L-glutamic acid (Glu) L-glutamine [Glu(NHj)] L-leucine (Leu) L-arginine (Arg) L-alanine (Ala) and L-valinamide (Va -NHj). 

SNARE motifs spontaneously assemble into SNARE complexes. These consist of a bundle of four intertwined a-helices that are connected by a total of 16 layers of mostly hydrophobic amino acid side chains. In the middle of the bundle, there is a highly conserved and polar 0-layer consisting of three glutamine and one arginine residue. These residues are among the most conserved in the SNARE superfamily and led to a classification of SNAREs into Q- and R-SNAREs, respectively. Different fusion steps require different sets of SNAREs but some SNAREs can participate in different complexes, and some fusion steps involve several SNARE complexes that appear to operate in parallel and independently. 

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