Why organic molecules in meteorites are post-biotic fossils

Amino acid molecules produced in the lab are 50% left handed and 50%
right handed. However, amino acids in fossils can be uneven-handed
(over 50% left-handed, for example). This unevenness or excess of left-
handed amino acids is a sure sign of past life (note 1). This sign of
past life is found in organic molecules in meteorites (notes 2, 3).
So, organic molecules in meteorites are post-biotic fossils.

Note 1: “Homochirality probably constitutes the most reliable
indicator of the biological vs. abiotic origin of organic molecules.”
http://www.esa.int/SPECIALS/ExoMars/SEMK39JJX7F_0.html


Note 2:"Fragments of the Tagish Lake meteorite contain amino acids
that are predominantly left-handed, as in life."
http://www.panspermia.org/whatsnew65.htm#110613

Note 3: “In the new research, the team reports finding excess left-
handed isovaline (L-isovaline) in a much wider variety of carbon-rich
meteorites.” http://www.nasa.gov/topics/solarsyst...minoacids.html

Added on Sept. 3, 2011:
Explanation on fossils’ amino acids

When organisms die and form fossils, the percentage of their left-
handed amino acids decrease gradually from 100%, then fluctuates
around 50 % until the percentage finally becomes stable at 50%.
Abiotic amino acids always are 50% left handed. So, small variations
from 50% of left-handed standard (protein) amino acids indicate past
life of the sample material.

Even-handed amino acids do not prove past life as they are found both
in non-life, and in not-well-preserved fossils, and very ancient
fossils. Uneven-handed standard amino acids prove origin in life as
they are found only in well-preserved fossils.

Ref.: http://en.wikipedia.org/wiki/Amino_a...ting#Principle

On Sep 3, 7:44*am, Wretch Fossil wrote:
Amino acid molecules produced in the lab are 50% left handed and 50%
right handed. However, amino acids in fossils can be uneven-handed
(over 50% left-handed, for example). This unevenness or excess of left-
handed amino acids is a sure sign of past life (note 1). This sign of
past life is found in organic molecules in meteorites (notes 2, 3).
So, organic molecules in meteorites are post-biotic fossils.

Note 1: “Homochirality probably constitutes the most reliable
indicator of the biological vs. abiotic origin of organic molecules.”http://www.esa.int/SPECIALS/ExoMars/SEMK39JJX7F_0.html

Note 2:"Fragments of the Tagish Lake meteorite contain amino acids
that are predominantly left-handed, as in life."http://www.panspermia.org/whatsnew65.htm#110613

Note 3: “In the new research, the team reports finding excess left-
handed isovaline (L-isovaline) in a much wider variety of carbon-rich
meteorites.”http://www.nasa.gov/topics/solarsyst...and_aminoacids....

Added on Sept. 3, 2011:
Explanation on fossils’ amino acids

When organisms die and form fossils, the percentage of their left-
handed amino acids decrease gradually from 100%, then fluctuates
around 50 % until the percentage finally becomes stable at 50%.
Abiotic amino acids always are 50% left handed. So, small variations
from 50% of left-handed standard (protein) amino acids indicate past
life of the sample material.

Even-handed amino acids do not prove past life as they are found both
in non-life, and in not-well-preserved fossils, and very ancient
fossils. Uneven-handed standard amino acids prove origin in life as
they are found only in well-preserved fossils.

Ref.:http://en.wikipedia.org/wiki/Amino_a...ting#Principle

Maybe a fossil is a mirror image.? Lets think of proteins after all
they are polypeptide molecules that are long chains of amino acids
bonded together. Fasinating how amino acids when ingested by an animal
and then assembled according to DNA instructions. I think the right
or left is based on the coiling structure of the protein(yes) . Here
in our universe (Earth) most humankind is right handed at this time.
Back in early man maybe if we found his fossils it would show him to
be much more left handed??? Treb is giving me a left handed thumbs
up Get the picture TreBert

On Sep 3, 7:44*am, Wretch Fossil wrote:
Amino acid molecules produced in the lab are 50% left handed and 50%
right handed. However, amino acids in fossils can be uneven-handed
(over 50% left-handed, for example). This unevenness or excess of left-
handed amino acids is a sure sign of past life (note 1).
Or just maybe the optical activity of the mixture was caused by
contamination by living things on earth after the meteorite fell.
Meteors don't fall into clean rooms, after all.

Darwin123 wrote:
On Sep 3, 7:44 am, Wretch Fossil wrote:
Amino acid molecules produced in the lab are 50% left handed and 50%
right handed. However, amino acids in fossils can be uneven-handed
(over 50% left-handed, for example). This unevenness or excess of left-
handed amino acids is a sure sign of past life (note 1).
Or just maybe the optical activity of the mixture was caused by
contamination by living things on earth after the meteorite fell.
Meteors don't fall into clean rooms, after all.
Some amost do.
Those who fall on the antartica snowfields are (almost)red hot when
they hit the snow, and melt themselves into a nice deep-freeze,
so there is hardly any chance of contamination.
Scientists are mining there for pristine meteorites.