scholarly journals Glyceraldehyde-3 Phosphate Dehydrogenase From the Red Kangaroo (Megalelia Rufa): Purification and the Amino Acid Sequence Around a Reactive Cysteine

1971 ◽  
Vol 24 (2) ◽  
pp. 263 ◽  
Author(s):  
RJ Simpson ◽  
BE Davidson
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Amino Acid Sequences ◽  
Red Kangaroo ◽  
Leg Muscle

Glyceraldehyde-3-phosphate dehydrogenase from leg muscle of M. rufa has been extracted and purified. The reaction of the enzyme with iodoacetate, the amino acid composition, tryptic fingerprint, and some amino acid sequences (in-cluding that around the reactive cysteine) indicate that kangaroo glyceraldehyde-3-phosphate dehydrogenase is almost identical with pig glyceraldehyde-3-phosphate dehydrogenase.

Chemical Data on Pituitary Gonadotropins and Their Implication to Evolution

1982 ◽  
Vol 39 (1) ◽  
pp. 80-91 ◽  
Author(s):  
E. Burzawa-Gerard
Keyword(s):  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Quaternary Structure ◽  
Chelonia Mydas ◽  
Amino Acid Sequences ◽  
Chemical Data ◽  
Pituitary Hormone ◽  
Hybrid Molecules ◽  
Α And Β Subunits

Chemical data on gonadotropins from several vertebrate species are summarized and discussed from an evolutionary point of view. A high degree of homology has been observed between mammalian gonadotropins (LH and FSH) and thyrotropin (TSH). In non-mammalian species the existence of LH and FSH-like hormones has been demonstrated except for squamate and fish species. Especially in fish the number of GTHs is still controversial. One pituitary glycoprotein assumes various gonadotropic functions of the pituitary, and a second pituitary hormone (carbohydrate-poor) acts on fish ovarian growth. GTHs from bird, reptile, amphibian, and fish pituitaries have been purified and chemically characterized (amino acid composition, carbohydrate content). The existence of a quaternary structure has been demonstrated for several tetrapod LHs and fish GTHs. The amino acid composition of α and β subunits purified from turkey (Meleagris gallopavo), and turtle (Chelydra serpentira, Chelonia mydas) LHs and from common carp (Cyprinus carpio) and sturgeon (Acipenser stellatus) GTHs showed homology with the mammalian α and β subunits. The partial sequences of carp GTH subunits have shown that the carp GTH β was more closely related to mammalian LH β than to FSH β. Hybrid molecules could be obtained by association of heterologous subunits. The kinetics of subunit association has been studied in vitro. As compared to ovine LH, subunit association of carp GTH was more rapid and thermodependent. The subunit β seemed to determine the thermodependence. The various GTH subunits in living vertebrate probably derive from a common ancestral molecule.Key words: vertebrate gonadotropins, chemical characterizations, GTHs subunits, amino acid sequences, hybrid molecules, evolution.

scholarly journals The primary structure of aspartate aminotransferase from pig heart muscle. Partial sequences determined by digestion with thermolysin and elastase

1973 ◽  
Vol 133 (4) ◽  
pp. 805-819 ◽  
Author(s):  
Francesco Bossa ◽  
Donatella Barra ◽  
Massimo Carloni ◽  
Paolo Fasella ◽  
Francesca Riva ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Primary Structure ◽  
Aspartate Aminotransferase ◽  
Heart Muscle ◽  
Science And Technology ◽  
Amino Acid Sequences ◽  
Amino Acid Residues ◽  
Lending Library

Peptides produced by thermolytic digestion of aminoethylated aspartate aminotransferase and of the oxidized enzyme were isolated and their amino acid sequences determined. Digestion by elastase of the carboxymethylated enzyme gave peptides representing approximately 40% of the primary structure. Fragments from these digests overlapped with previously reported sequences of peptides obtained by peptic and tryptic digestion (Doonan et al., 1972), giving ten composite peptides containing 395 amino acid residues. The amino acid composition of these composite peptides agrees well with that of the intact enzyme. Confirmatory results for some of the present data have been deposited as Supplementary Publication 50018 at the National Lending Library for Science and Technology, Boston Spa, Yorks. LS23 7BQ, U.K., from whom copies can be obtained on the terms indicated in Biochem. J. (1973) 131, 5.

scholarly journals Determination of Amino Acid Composition of Ganirelix Acetate in an Injectable Formulation by Pre-column Derivatization with 6-Aminoquinolyl-N-hydroxysuccinimidyl Carbamate

2020 ◽  
Vol 58 (8) ◽  
pp. 687-694
Author(s):  
Kumarswamy Ummiti ◽  
J V Shanmukha Kumar
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Flash Chromatography ◽  
Molar Ratio ◽  
Acid Mixture ◽  
Injectable Formulation

Abstract Ganirelix is a synthetic decapeptide linked with nine different amino acids. To understand the peptide amino acid sequence or primary structure, the first step is to determine the amino acid composition of the peptide which can be a determining factor for the peptide immunogenicity. Edman degradation is not a suitable analytical technique to identify amino acid sequence present in Ganirelix due to the absence of uncharged N-terminal amino group. To address this challenge, a pre-column derivatization method was developed with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate reagent. In the present work, the Ganirelix active pharmaceutical ingredient present in the injectable formulation was isolated by fraction collection and further purified by flash chromatography. The amino acid composition of Ganirelix is assayed by carrying out acid hydrolysis with 6 mol L−1 hydrochloric acid solution containing 1% phenol at 100°C for 24 h and derivatization with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate reagent solution, followed by determination of individual amino acids by reverse-phase chromatography using a C18 column. High resolution was achieved for the nine amino acid mixture. The amino acid composition results of temperature-stressed Ganirelix generic product and reference listed drug are in good agreement with the theoretical molar ratio of label information.

scholarly journals The cDNA and protein sequences of human lactate dehydrogenase B

1987 ◽  
Vol 248 (3) ◽  
pp. 933-936 ◽  
Author(s):  
I Sakai ◽  
F S Sharief ◽  
Y C Pan ◽  
S S Li
Keyword(s):  
Amino Acid ◽  
Lactate Dehydrogenase ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Amino Acid Sequences ◽  
British Library ◽  
Amino Acid Residues ◽  
Coding Region ◽  
Cdna Insert ◽  
Protein Coding

Human lactate dehydrogenase B (LDH-B) cDNA was isolated and sequenced. The LDH-B cDNA insert consists of the protein-coding sequence (999 bp), the 5′ (54 bp) and 3′ (203 bp) non-coding regions, and the poly(A) tail (50 bp). The predicted sequence of 333 amino acid residues was confirmed by amino acid composition and/or sequence analyses of a total of 185 (56%) residues from tryptic peptides of human LDH-B protein. The nucleotide and amino acid sequences of the human LDH-B coding region show 68% and 75% homologies respectively with those of the human LDH-A. The peptide map and amino acid composition data have been deposited as Supplementary Publication SUP 50139 (7 pages) at the British Library Lending Division, Boston Spa, Wetherby, West Yorkshire LS23 7BQ, U.K., from whom copies are available on prepayment [see Biochem. J. (1987) 241, 5].

Amino Acid Composition and NH2-Terminal Amino Acid Sequence of Rat Platelet Secretory Phospholipase A21

1987 ◽  
Vol 101 (5) ◽  
pp. 1311-1314 ◽  
Author(s):  
Makio HAYAKAWA ◽  
Kazuhiko HORIGOME ◽  
Ichiro KUDO ◽  
Motowo TOMITA ◽  
Shoshichi NOJIMA ◽  
...  
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Terminal Amino Acid ◽  
Secretory Phospholipase ◽  
Terminal Amino ◽  
Terminal Amino Acid Sequence
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