Complex sentence: Professor Hirata's assignment led Shimomura to identify the protein behind this and he published the findings in the Bulletin of the Chemical Society of Japan in a paper entitled "Crystalline Cypridina luciferin", which caught the attention of Professor Frank Johnson at Princeton University.
Split into simpler sentences: Professor Hirata's assignment led Shimomura to identify the protein behind this and he published the findings in the Bulletin of the Chemical Society of Japan in a paper entitled "Crystalline Cypridina luciferin". The findings caught the attention of Professor Frank Johnson at Princeton University.