+---------------SUBJ:V-N---------------+    
      +---------COMP:N-N(in)---------+       |    
      +-----COMP:N-N(of)----+        |       |    
      |             +MOD_ATT+        |       |    
      |             |       |        |       |    
 Expression of predominant IGF in embryos occurs .
COMP:N-N(of) (expression,IGF)
COMP:N-N(in) (expression,embryo)
MOD_ATT:N-ADJ (IGF,predominant)
SUBJ:V-N (occur,expression)