6242
The casein fraction of 13 Portuguese PDO cheeses were analysed using Urea - PAGE and reverse phase - high performance liquid chromatography ( RP - HPLC ) and then subjected to chemometric evaluation .
 Chemical: Urea
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: Urea