24051
To assess their biosynthetic potential , the strains were PCR screened for the presence of secondary metabolite genes encoding nonribosomal synthetase ( NRPS ) and polyketide synthases ( PKS ) .
 None
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:  
Answer:
 None