Abstract: Methods for forming a sequence encoded oligomer includes oligomerizing first and second antibody-oligonucleotide conjugates through hybridization using at least one template oligo nucleotide. The first antibody-oligonucleotide conjugate comprises an oligonucleotide strand comprising a first sequence and a second sequence joined by an alkyne. The second antibody-oligonucleotide conjugate comprises an oligonucleotide strand comprising a third sequence and a fourth sequence joined by an alkyne.

Abstract: The present disclosure is generally directed to methods for controlling the polymerization of metastable oligonucleotide hairpins using the hybridization chain reaction (HCR) by introducing one or more base pair mismatches in the hairpins. Control was achieved through the introduction of a base-pair mismatch in the duplex of the hairpins. The mismatch modification allows one to energetically differentiate initiation versus propagation events, leading to DNA oligomers up to 10-mers with degree of polymerization (DP) dispersity between 1.3 and 1.6.