p.Gly373Arg, we performed locus-specific amplification of genomic DNA
followed by GS Junior sequencing. We designed fusion primers containing
genome-specific sequences along with distinct MIDs (multiplex identifier
sequences) used to differentiate samples being run together on the same
plate and sequencing adapters to generate amplicons ranging in size from 290
to 310 bp using primer3plus software. Primer sequences are available upon
request (Dr. Renzo Guerrini). Small DNA fragments were removed using
Agencourt AMPure XP (Beckman Coulter, Beverly, MA) according to the
manufacturer’s protocol. All amplicons were quantified using the
Quant-iT PicoGreen dsDNA reagent (Invitrogen Corporation, Life Technologies,
Carlsbad, CA), pooled at equimolar ratios, amplified by emulsion PCR using
the GS Junior Titanium emPCR kit (Lib-A kit, Roche Applied Science,
Mannheim, Germany) and pyrosequenced in the sense and antisense strands on a
GS Junior sequencer (Roche) following the manufacturer’s
instructions. We performed data analysis using the GS Amplicon Variant
Analyzer version 3.0 (AVAv3.0) software (Roche).