With the exception of glycine, naturally occurring amino acids are chiral and almost invariably occur in the L-configuration.
wɪððɪ ɛksˈɛpʃən ʌv ɡlˈaɪsiːn, nˈætʃɚɹəli əkˈɜːɹɪŋ ɐmˈiːnoʊ ˈæsɪdz ɑːɹ kˈaɪɹəl ænd ˈɔːlmoʊst ɪnvˈɛɹɪəbli əkˈɜːɹ ɪnðɪ ˈɛlkənfˌɪɡjɚɹˈeɪʃən.