2805
ORF3 encodes a putative periplasmic c - type cytochrome with a molecular mass of 94 , 000 Da and contains seven c - heme - binding motifs but shows no sequence homology to occ or ORF1 .
 GENE: periplasmic c - type cytochrome; GENE: occ
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: periplasmic c - type cytochrome; GENE: occ