Last universal ancestor LUCA LUA
<p>Mar 21, 2009 12:42 PM
 
LUA...   3.5 to 3.8 Billion Years Ago.
 
Stunning list of early features:
 
DNA with 4 nucleotides
3 nucl codons
only 20 AA's used.
 
DNA polymerase
 
DNA replair enzyes.
 
histones.
 
RNA
 
Proteins
 
ribosomes
 
only L-isomer AA's.
 
Glucose... only the D-isomer
 
ATP.
 
 
 
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