1124
Western blotting ( immunoblotting ) with an antiserum to a partial SOD expressed in Escherichia coli revealed two proteins with estimated molecular masses of 19 and 29 kDa .
 GENE: SOD
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: SOD