Heterocyclic compounds recovered from carbonaceous chondrites

Evidence for Extraterrestrial Amino-acids and Hydrocarbons in the Murchison Meteorite

Keith A. Kvenvolden, James G. Lawless, Katherine L. Pering et al. · Nature · 1970 · 852 citations

Natural Sciences, Astronomy, Earth Sciences +14

Nonprotein Amino Acids in the Murchison Meteorite

Keith A. Kvenvolden, James G. Lawless, Cyril Ponnamperuma · Proceedings of the National Academy of Sciences · 1971 · 305 citations · Full text

Natural Sciences, Astronomy, Earth Sciences +14

Choline: High-Affinity Uptake by Rat Brain Synaptosomes

Henry I. Yamamura, Solomon H. Snyder · Science · 1972 · 285 citations

Life Sciences, Neurobiology, Neuroscience +10

FORMATION OF ADENINE BY ELECTRON IRRADIATION OF METHANE, AMMONIA, AND WATER

Cyril Ponnamperuma, Richard M. Lemmon, Ruth Mariner et al. · Proceedings of the National Academy of Sciences · 1963 · 126 citations · Full text

Engineering, Bioengineering, Cell Biology +16

Origin of organic matter in early solar system—II. Nitrogen compounds

Ryoichi Hayatsu, Martin H. Studier, Atsuko Oda et al. · Geochimica et Cosmochimica Acta · 1968 · 120 citations

Natural Sciences, Astronomy, Chemistry +15