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. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: Curr Opin Genet Dev. 2012 Mar 6;22(3):221–228. doi: 10.1016/j.gde.2012.02.004

Figure 3. Possible involvement of DNA secondary structure.

Figure 3

Palindromic sequence possesses the potential for forming an unusual secondary structure by intrastrand base pairing in single stranded DNA. (A) Palindromic DNA may form a hairpin structure during DNA replication. (B) Palindromic DNA can form a double-stranded cruciform structure. Palindromic regions are depicted blue arrows. The red arrows represent the complement of the sequence indicated by blue arrows.