25321
For individual proteins , bovine serum albumin had higher binding affinity with norbixin than beta - lactoglobulin and alpha - lactalbumin , while kappa - casein bound with norbixin better than alpha - and beta - caseins .
 norbixin, norbixin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 norbixin, norbixin