Before revision:  This phenomenon, dubbed the "magic-number " effect , occurs if the two polymers can form fully-bonded small oligomers by virtue of the number of binding sites in one polymer being an integer multiple of the number of binding sites of the other.
After revision:  This phenomenon, dubbed the "magic-number effect" , occurs if the two polymers can form fully-bonded small oligomers by virtue of the number of binding sites in one polymer being an integer multiple of the number of binding sites of the other.