A method for identifying a nucleotide in a template nucleic acid by (a) providing a plurality of primer-template nucleic acid hybrids, wherein the primers have an extendable 3′ end; (b) contacting the plurality with: (i) blocked nucleotides to produce a first subset of the primer-template nucleic acid hybrids that include a blocked nucleotide at the 3′ end, and (ii) a ternary complex inhibitor to produce a second subset of the primer-template nucleic acid hybrids that include a ternary complex inhibitor; (c) forming ternary complexes that each include a polymerase, a primer-template nucleic acid hybrid of the first subset, and a cognate nucleotide; and (d) detecting the ternary complexes, thereby identifying a nucleotide in the template nucleic acid.
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