Regarding this concept, called chirality.monfang said:Only Right Handed Amino Acids can form life, Left Handed are toxic to life. So based on experiments done, the conditions that are commonly thought of as the conditions before life are impossible to create life.
L-type amino acids (what you call right-handed, but actually means "left-handed") are prevalent in complex life forms.
However, most bacteria are D-type, (what you call left-handed, but actually means "right-handed")
Life exists on this planet with amino acids of both chiralities.
Ergo your claim is patently false. Not only is your claim on chirality completely false, D-type amino acids are not, in fact, toxic.
To prove this, you need only perform an experiment wherein you eat a substance containing both types of amino acids.
I'm going to go eat a bowl of yogurt now.
Continue.