21253
The nu NO in SNP acts as a model system for the nitrosyl ligand found in metalloproteins which play an important role in the transportation and detection of nitric oxide ( NO ) in biological systems .
 Chemical: NO; Chemical: SNP; Chemical: nitrosyl; Chemical: nitric oxide; Chemical: NO
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: NO, SNP, nitrosyl, nitric oxide, NO 
Answer:
 Chemical: NO; Chemical: SNP; Chemical: nitrosyl; Chemical: nitric oxide; Chemical: NO