5492
Thus , we present information on three important receptor families , the integrins , the receptor tyrosine kinases , and the G protein - coupled receptors in terms of their suitability for targeted delivery of oligonucleotides .
 Chemical: tyrosine
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: tyrosine