2007
Molecular cloning of a cDNA encoding rat NADH - cytochrome b5 reductase and the corresponding gene .
 rat NADH - cytochrome b5 reductase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 rat NADH - cytochrome b5 reductase