27766
We show that such patterns retain their fluorescence and bioaffinity upon electron beam lithography and , based on the streptavidin - biotin interaction , allow for detection of proteins , colloidal gold nanoparticles and magnetic microparticles .
 Chemical: biotin
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: biotin 
Answer:
 Chemical: biotin