Fig. 1. Multiplex droplet digital PCR design and validation.
A Primers and (B) probes were designed to anneal to exons of target genes commonly involved in somatic translocations, including EWSR1, FLI1, ERG, FUS, WT1, PAX3, PAX7, FOXO1, BCOR, CCNB3. C The multiplexed ddPCR amplifications are split into two independent reactions labeled PCR1 and PCR2. Each reaction uses the same complete primer set but only a specific subset of probes such that the two PCR reactions produce a unique combination of fluorescent signals (characterized by either FAM, HEX, or both) that is characteristic of a unique set of gene partners. D The unique fluorescent signal combination (across PCR1 and PCR2) for each targeted fusion was validated with cells lines or a synthetic DNA construct.
