Ko se pataki pupo lara awon eniyan, ti o tumo si wipe ara le seda re.L-isomer re (apa osi) ti alanine je ikan lara ogun  awon amino acid ti o n koodu fun awon koodu gene ara.. 
Awon obi e ni  Anna Maria Jensen (1854-1896) ati Peder Matthias Olsen (1849-1896) ti ilu  FarSunsun, Norway.. 