4456
Examination of phosphorylation in retinoblastoma ( Rb ) protein , we found an inhibitory effect by glucosamine at 20 and 50 mM .
 Chemical: glucosamine
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: glucosamine