507
The insertion was a 5 - truncated form of human L1 inversely integrated in the 5 - untranslated region in the muscle exon 1 , which affected the transcription or the stability of the muscle form of dystrophin transcripts but not that of the brain or Purkinje cell form , probably due to its unique site of integration .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 None