26054
In addition , only the polymer containing the highest incorporation of oligohistidine residues led to increases in transfection efficiency over the HPMA - oligolysine base polymer .
 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: HPMA