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Heme oxygenase 1 is an essential enzyme in heme catabolism that cleaves heme to form biliverdin , iron , and carbon monoxide .
 GENE: Heme oxygenase 1
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: Heme oxygenase 1