The specificity of trypsin is determined by on the enzyme. The specificity of elastase is determined by on the enzyme. Three amino acids: Asp, His and Ser, of form a triad to cleave peptide bonds of a substrate.

Another Asp in something like a deep pocket; a superficial amino acid binding pocket with either a slight neutral side, neither elastase nor trypsin.  

Explanation:

The homologs with chymotrypsin include trypsin but mostly elastase. As either a central amino acid, chymotrypsin encompasses serine.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: