6178
Complete nucleotide sequence of the bacteriophage K1F tail gene encoding endo - N - acylneuraminidase ( endo - N ) and comparison to an endo - N homolog in bacteriophage PK1E .
 bacteriophage K1F tail gene, endo - N - acylneuraminidase, endo - N, endo - N homolog
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 bacteriophage K1F tail gene, endo - N - acylneuraminidase, endo - N, endo - N homolog