596
Analysis of the entire 16 . 7 - kb mt genome determined that a MDP1 mediates cleavage of chick mtDNA in vitro at three H - and two L - strand sequence - specific target sites located within a 90 - bp A + T - rich genomic tract , theoretically capable of forming stable secondary structures , approximately 200 bases upstream from the H - strand origin ( OH ) of replication .
 MDP1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 MDP1