tokens: Second , when the NBF1+ R protein , the NBF2 protein , and a mixture of the two proteins were folded separately and analyzed by molecular sieve chomatography , the mixture was found to elute prior to either NBF1+ R or NBF2 .
folded_tokens: second , when the nbf1+ r protein , the nbf2 protein , and a mixture of the two protein be fold separately and analyze by molecular sieve chomatography , the mixture be find to elute prior to either nbf1+ r or nbf2 .