Complex sentence: In 1988 the Institute was rearranged and entered the Scientific Industrial Union "Bacteriophage" (SIU "Bacteriophage"), and its scientific portion was renamed the George Eliava Research Institute of Bacteriophage.
Split into simpler sentences: In 1988 the Institute was rearranged again and emerged as the Scientific Industrial Union "Bacteriophage" (SIU "Bacteriophage"). Around that time, its scientific portion was renamed the George Eliava Research Institute of Bacteriophage.