26048
Influence of histidine incorporation on buffer capacity and gene transfection efficiency of HPMA - co - oligolysine brush polymers .
 Chemical: histidine; Chemical: HPMA
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: histidine; Chemical: HPMA