Daniel I.C. Wang, an MIT Institute Professor who was considered one of the founding fathers of the field of biochemical engineering, died Saturday in Cambridge, Massachusetts. He was 84. During his long career at MIT, Wang contributed to many aspects of biochemical engineering — a field that involves genetically engineering microbes and human cells to produce useful proteins. His research spanned all phases of the process, including fermentation, monitoring and control of bioprocesses, enzyme technology, product purification, and protein folding. In 1985, Wang was the driving force behind the launch…