Kën ye rot wääc (X-ray diffraction patterns DNA) loi ran cɔla Florence Bell Wereŋ de kën Wïc cɔla Ph.D. thesis (1939) aa ke thöŋ keke (naa cïk cak yaa kä puɔth cït) "thuuraa kaa 51", ku kën wïc kënë acï riɔ̈ɔ̈kic tɔŋ Pinynhom rou (World War II).