+-----------------SUBJ:V-N-----------------+    
      +-------------COMP:N-N(of)------------+    |    
      +-------COMP:N-N(of)-------+          |    |    
      |            +MOD_ATT:N-ADJ+          |    |    
      |            |       +MOD_A+          |    |    
      |            |       |     |          |    |    
 Interaction of single stranded DNA and LCP 1 occurs .
COMP:N-N(of) (interaction,DNA)
COMP:N-N(of) (interaction,1)
MOD_ATT:N-ADJ (DNA,single)
MOD_ATT:N-ADJ (DNA,strand)
SUBJ:V-N (occur,interaction)