4606
Four families of homing endonucleases have been identified , including the LAGLIDADG , the His - Cys box , the GIY - YIG and the H - N - H endonucleases .
 GENE: homing endonucleases; GENE: LAGLIDADG; GENE: His - Cys box; GENE: GIY - YIG; GENE: H - N - H endonucleases
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: homing endonucleases; GENE: LAGLIDADG; GENE: His - Cys box; GENE: GIY - YIG; GENE: H - N - H endonucleases