29667
Inducible nitric oxide synthase ( iNOS ) mRNA and protein levels at 6h were significantly lower in lpr mice , which correlated with reduced nitrotyrosine staining .
 Chemical: nitric oxide; Chemical: nitrotyrosine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: nitric oxide; Chemical: nitrotyrosine