22065
To elucidate the anti - venom mechanism of persimmon tannin , the interaction between a polymeric persimmon proanthocyanidin fraction ( PT40 ) and phospholipase A2 ( PLA2 ) or bovine serum albumin ( BSA ) were studied using a competitive binding assay and spectroscopic methods including Fourier transform infrared spectroscopy ( FT - IR ) , circular dichroism ( CD ) , and resonance light scattering ( RLS ) spectroscopy .
 Chemical: proanthocyanidin
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: proanthocyanidin 
Answer:
 Chemical: proanthocyanidin