10993
Furthermore , as in the human gene , the 3 ' end of the Cacna1f gene maps within 5 kb of the 5 ' end of the mouse synaptophysin gene in a region orthologous to Xp11 . 23 .
 Cacna1f gene, mouse synaptophysin gene
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Cacna1f gene, mouse synaptophysin gene