Beta-Aminoisobutyric Acid, A Possible Factor in Pyrimidine Metabolism.
Experimental Biology and Medicine, 1951 Summary(1) A compound frequently noted in a chromatographic study of urinary amino acids has now been isolated from the urines of two cancer patients and identified as beta-aminoisobutyric acid (BAIB). (2) In a group of 140 apparently healthy subjects, 52 individuals showed detectable urinary levels of BAIB (>0.15 millimole per liter), and three of ...
K, FINK, R B, HENDERSON, R M, FINK
openaire +2 more sources
Correlating Mineralogy and Amino Acid Contents of Milligram-Scale Murchison Carbonaceous Chondrite Samples [PDF]
Amino acids, the building blocks of proteins, have been found to be indigenous in most of the carbonaceous chondrite groups. The abundances of amino acids, as well as their structural, enantiomeric and isotopic compositions differ significantly among ...
Berger, Eve L. +5 more
core +1 more source
Hydroxy amino acids identified in the Murchison meteorite and their plausible formation pathways [PDF]
, 2016 第7回極域科学シンポジウム:[OA] 南極隕石/はやぶさ12月1日（木）国立国語研究所 ...
core +1 more source
Chiral Biomarkers and Microfossils in Carbonaceous Meteorites [PDF]
Homochirality of the biomolecules (D-sugars of DNA and RNA and L-amino acids of proteins) is a fundamental property of all life on Earth. Abiotic mechanisms yield racemic mixtures (D/L=1) of chiral molecules and after the death of an organism, the ...
Hoover, Richard B.
core +2 more sources
Studies on_??_-Aminoisobutyric Acid by Paper Chromatography
Journal of the agricultural chemical society of Japan, 1953 カゼインを加水分解して〓-アミノイソ酪酸の分離確認をペーパークロマトグラフィーで研究して次の結果を得た. (1) ブタノール・酢酸・水(4・1:1.5重量)混液で他の殆んどのアミノ酸からイソの部分を分離できるがノルマルとは分離できない. (2) エタノール・水混液(9 1)が両異性体をよく分離展開する. (3) サリチルアルデハイドによるアセトン呈色によつて上記の経過で展開分離したアミィ酸がイソであることを傍証した. (4) 故に第一次にブタノール酢酸水混液で,第二次にてエタノール水混液で展開すればイソを純粋に分離確認し得る.この方法でガゼイン水解物中にイソの存在を確認した.
Yasuyoshi OSHIMA +2 more
openaire +2 more sources
Changes in Plasma Free Amino Acid Profile in Endurance Athletes over a 9-Month Training Cycle
MetabolitesWe aimed to evaluate long-term changes in proteinogenic and non-proteinogenic plasma free amino acids (PFAA). Eleven male endurance triathletes participated in a 9-month study.
Krzysztof Kusy +8 more
doaj +1 more source
Fungal Peptaibiotics: Assessing Potential Meteoritic Amino Acid Contamination [PDF]
, 2010 The presence of non-protein alpha-dialkyl-amino acids such as alpha-aminoisobutyric acid (alpha-A1B) and isovaline (Iva), which are relatively rare in the terrestrial biosphere, has long been used as an indication of the indigeneity of meteoritic amino ...
Bruckner, H. +4 more
core +1 more source
Organic Analysis in the Miller Range 090657 CR2 Chondrite: Part 2 Amino Acid Analyses [PDF]
Primitive carbonaceous chondrites contain a wide variety of organic material, ranging from soluble discrete molecules to insoluble, unstructured kerogen-like components, as well as structured nano-globules of macromolecular carbon.
Aponte, J. C. +7 more
core +1 more source
Chemoenzymatic synthesis of polypeptides containing the unnatural amino acid 2-aminoisobutyric acid
Chemical Communications, 2017 Polypeptides containing 2-aminoisobutiryc acid (Aib) as an unnatural amino acid were synthesized via chemoenzymatic polymerization of the tripeptide ethyl ester AlaAibAla-OEt.
Kousuke, Tsuchiya, Keiji, Numata
openaire +3 more sources
Nanoflow Separation of Amino Acids for the Analysis of Cosmic Dust [PDF]
, 2008 The delivery of amino acids to the early Earth by interplanetary dust particles, comets, and carbonaceous meteorites could have been a significant source of the early Earth's prebiotic organic inventory.
Dworkin, Jason P. +2 more
core +1 more source