Mumbai beat Bangalore by a margin of about Rs 200 crore to become India’s top biotech city in terms of revenue, according to a recent industry survey.

City-based biopharmaceuticals firm Biocon, known for its insulin and cancer drugs, had the highest revenue in 2009-10 growing at 29.34 pc to record revenues of Rs 1,180 crore, according to a survey jointly conducted by the Association of Biotechnology Led Enterprises (ABLE) and monthly journal Biospectrum.