Abstract: In accordance with some embodiments, systems, methods, and media for determining relative quality of oligonucleotide preparations. In some embodiments, a system comprises a processor programmed to: (a) receive genetic sequencing results for multiple libraries with target concentrations of oligonucleotides; (b) calculate at least one prediction band; (c) repeat (a) and (b) for multiple preparations; (d) determine boundaries for a final prediction band based on the prediction bands calculated at (b) for each of the preparations; and (e) present a report indicative of quality of the libraries, including metrics indicative of the final prediction band.

Abstract: Provided herein are methods and compositions to make guide nucleic acids (gNAs), nucleic acids encoding gNAs, collections of gNAs, and nucleic acids encoding for a collection of gNAs from any source nucleic acid. Also provided herein are methods and compositions to use the resulting gNAs, nucleic acids encoding gNAs, collections of gNAs, and nucleic acids encoding for a collection of gNAs in a variety of applications.