isovaline

The two isolated one particular amino acid called isovaline from Murchison, concentrated it, and then did an analysis of its chirality.

First Contact Marc Kaufman 2011

The two isolated one particular amino acid called isovaline from Murchison, concentrated it, and then did an analysis of its chirality.

First Contact Marc Kaufman 2011

They studied an amino acid called isovaline in six meteorites that showed evidence of ancient exposure to liquid water for about 1000 to 10,000 years.

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Since everything nonbiological was understood to have molecules equally left- and right-handed, the assumption had to be that the isovaline would also be equally mixed.

First Contact Marc Kaufman 2011

Glavin and Dworkin used their more sophisticated instruments a decade later to make similar measurements of isovaline from Murchison and other meteorites.

First Contact Marc Kaufman 2011

Since everything nonbiological was understood to have molecules equally left- and right-handed, the assumption had to be that the isovaline would also be equally mixed.

First Contact Marc Kaufman 2011

Glavin and Dworkin used their more sophisticated instruments a decade later to make similar measurements of isovaline from Murchison and other meteorites.

First Contact Marc Kaufman 2011

This is the conclusion of NASA astrobiologists Daniel Garvin and Jason Dworkin who examined meteorites rich in carbon to find the amino acid isovaline.

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Since isovaline isn't actively used by living things on Earth and maintains the same chirality over billions of years, scientists can use it to take a look back at the dawn of the solar system and determine the ratio of left-handed to right-handed molecules without the threat of biological contamination.

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Enrichment of the amino acid L-isovaline by aqueous alteration on CI and CM meteorite parent bodies

WordPress.com News 2009