Custom spiking is the addition of differing molar concentration of bases at a
single position, this is different from degeneracy at a position based on codons.
Codon based degeneracy is usually equimolar concentration of each base at the
same position (done at no extra charge for all internal and 5’ position, see
order form for single letter IUB codes). Custom spiking (example, 10% A, 75% G,
5% C & 10% T) has to be specified as required on the order form.
Custom column has to be prepared when the degeneracy and custom spiking is at
the 3’ position.Customers who wish custom spiking at certain positions of their oligo must include the relevant specifics
(position and spiking composition) in the comments section of the on-line order form for that particular oligo.
The prices listed below is for one 3' site or up to 8 internal sites in the same oligo.