| 
				 
				
				Ex 2  | 
				
				 
				Constraint  | 
				
				 
				 Calculate Gibbs energy of 
				mRNA secondary structure and then screen out a given gene 
				construct if calculated Gibbs energy is lower than the threshold 
				value 
				
				 (It is 
				a predefined script named as 'Check stable mRNA structure')  | 
				
				 
				 PropBag_Param.Value 
				
				 mRNApredict.Calculate 
				
				 mRNApredict.GibbsFreeEnergy 
				
				 GeneConstruct  |