10.22376/ijpbs.2019.10.1.p1-12 Volume 7 Issue 1 2016 (January - March) The silkworm lessThan i greaterThan Bombyx mori lessThan /i greaterThan L is known for the production of therapeutic bioactive enzymes. Studies were conducted to analyse the total protein content and enzyme activity of β- fructofuranosidase from the midgut region of five different races namely PM, NK lessThan sub greaterThan 2 lessThan /sub greaterThan , CSR lessThan sub greaterThan 2 lessThan /sub greaterThan , MH lessThan sub greaterThan 1 lessThan /sub greaterThan and RP lessThan sub greaterThan 9 lessThan /sub greaterThan ×NK lessThan sub greaterThan 2 lessThan /sub greaterThan . Protein content was determined by Lowry's method and enzyme activity was determined by DNS method. On analysis, the protein content and enzyme activity was found to be highest in RP lessThan sub greaterThan 9 lessThan /sub greaterThan ×NK lessThan sub greaterThan 2 lessThan /sub greaterThan and lowest in PM, in comparison to other races. MAMATHA C, BELA ZUTSHI AND JAYAPRAKASH The silkworm Bombyx mori L is known for the production of therapeutic bioactive enzymes. Studies were conducted to analyse the total protein content and enzyme activity of β- fructofuranosidase from the midgut region of five different races namely PM, NK2, CSR2, MH1 and RP9×NK2. Protein content was determined by Lowry’s method and enzyme activity was determined by DNS method. On analysis, the protein content and enzyme activity was found to be highest in RP9×NK2 and lowest in PM, in comparison to other races. 171-174