I have noticed that the good designs don’t have more than max 2 GC-pairs in a row, in a string 4 nucleotides long. I would like a strategy specificly for strings 4 nucleotides long that says:
Max. 2 GC-pairs next to each other in a string 4 NT’s long. (their direction compared to each other, does not matter in this strategy)
If 3 GC-pairs are connected with each other, give -1
If 4 GC-pairs are connected with each other, give -2
Neck area is excluded from this strategy. The neckarea behaves differently. 4 GC-pairs in row have been seen working.
(It won’t matter if there is 3 GC-pairs in the 4 Nt’s string all in all, as long as there is an other base pair than GC between one of the GC-pairs and the other two GC-pairs.)