Japanese scientists detected all five nucleobases — building blocks of DNA and RNA — in samples returned from asteroid Bennu ...

Scientists detected all five nucleobases -- building blocks of DNA and RNA -- in samples returned from asteroid Bennu by NASA's OSIRIS-REx mission.

Asteroids, small airless bodies within the inner solar system, are theorized to have contributed water and chemical building blocks of life to Earth billions of years ago. Although meteorites on Earth ...

Japanese collaborators detected all five nucleobases — building blocks of DNA and RNA — in samples returned from asteroid ...

Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502, Japan ...

该研究揭示了肠道沙门氏菌如何通过非编码小RNA在转录后水平协调N-乙酰神经氨酸代谢过程中不同氨基糖操纵子转录产物的机制。 唾液酸是一类以九碳糖神经氨酸为基本结构的衍生物。生命体中常见的唾液酸为N-乙酰神经氨酸，富集于哺乳动物上皮细胞表面。

Beijing Key Laboratory of Active Substances Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, ...