4174
The sequence of the 127 residue NrfF polypeptide , M ( r ) 14 , 522 , is strikingly similar to the CcI2 protein of R . capsulatus , especially in the putative haem - binding motif , RCPQCQNQN . ( ABSTRACT TRUNCATED AT 400 WORDS )
 GENE: 127 residue NrfF polypeptide , M ( r ) 14 , 522; GENE: CcI2 protein
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: 127 residue NrfF polypeptide , M ( r ) 14 , 522; GENE: CcI2 protein