4206
The degree of LPO purification was monitored by SDS - PAGE and its R ( z ) ( A ( 412 ) / A ( 280 ) ) value .
 Chemical: SDS
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: SDS