1928
Although ICAM-1 induction was unaffected, inhibitors of NADPH oxidase ( apocynin ) or cytochrome P-450 ( SKF525a ) suppressed VCAM-1 induction by TNF, revealing that several radical-generating systems are involved in its regulation.
 protein: NADPH oxidase; protein: cytochrome P-450; protein: ICAM-1; protein: VCAM-1
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: NADPH oxidase, cytochrome P-450, ICAM-1, VCAM-1 
Answer:
 protein: NADPH oxidase; protein: cytochrome P-450; protein: ICAM-1; protein: VCAM-1