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The crude proteins were separated by one dimensional 15 % sodium dodecyl sulphate polyacrylamide gel electrophoresis into two ( 49 . 8 and 5 . 5 kD ) and four ( 49 . 8 , 24 . 7 , 21 . 1 and 5 . 5 kD ) protein spots for Tongkat Ali Perak and Pahang , respectively .
 Chemical: sodium dodecyl sulphate polyacrylamide
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: sodium dodecyl sulphate polyacrylamide 
Answer:
 Chemical: sodium dodecyl sulphate polyacrylamide