+------------SUBJ:V-N-----------+--------COMP:V-N(in)-------+    
      +-----COMP:N-N(of)-----+        |          +--MOD_ATT:N-ADJ-+    
      |            +MOD_ATT:N+        |          |        +MOD_ATT+    
      |            |         |        |          |        |       |    
 Expression of __NODE__ protein(s) occurs in __NODE__ skeletal muscle .
COMP:N-N(of) (expression,protein(s))
MOD_ATT:N-ADJ (protein(s),__NODE__)
SUBJ:V-N (occur,expression)
COMP:V-N(in) (occur,muscle)
MOD_ATT:N-ADJ (muscle,__NODE__)
MOD_ATT:N-ADJ (muscle,skeletal)