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. 2017 Mar 2;13(3):e1005341. doi: 10.1371/journal.pcbi.1005341

Table 1. User-defined parameters.

Parameter Symbol Default Comments
Input file i Mandatory Path to input BED file.
Genome g Mandatory Path to genome in FASTA format.
Off Targets t 1,0,0,x,x String with maximum number of off-targets allowed with 0,1,2,3 and 4 mismatches (x: no limit).
Output prefix o “sgRNA_pairs” Path/prefix of output files.
Number of sgRNA pairs per target n 10 Maximum number of pairs to be returned.
Upstream design region (bp) du 500 bp Length of upstream region for protospacer search.
Downstream design region (bp) dd 500 bp Length of downstream region for protospacer search.
Upstream exclude region (bp) eu 100 bp Length of upstream region adjacent to target excluded from protospacer search.
Downstream exclude region (bp) ed 100 bp Length of downstream region adjacent to target excluded from protospacer search.
Diversity v 0.5 The maximum fraction of returned pairs that contain the same protospacer.
Individual score si 0.2 The minimum score individual protospacers must have to be considered.
Paired score sp 0.4 The minimum combined score that a protospacer pair must have to be considered.
Score combination sc sum Method by which individual scores are combined to yield pair score: addition (“sum”) or multiplied (“product”).
Ranking method r score Criteria for ranking protospacer pairs (“score” or “distance”).
Construct method c none Method applied when making protospacer pairs and oligo construction: “none” or “DECKO” (first protospacer starts with G)
Positive mask mp - Favoured regions from genome, in BED format.
Negative mask mn - Disfavoured regions from Genome, in BED format.