1354
Escherichia coli BL21 ( DE3 ) plysS , harbouring a recombinant plasmid containing the catalase - peroxidase gene , produced a large amount of proteins that co - migrated on SDS / PAGE with the native enzyme .
 GENE: catalase; GENE: peroxidase
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: catalase; GENE: peroxidase