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isotope_trace_evidence: integer span_from anchors on the isolated isotope - #17
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… on the isolated peak Measured on NGlycoM012 F21 (11,725 glycan-q PSMs, from a local cache): span_from='strongest' RAISED the share of precursors with no monoisotopic signal, from 2,668 to 3,588 of 5,683 untraced PSMs and from 224 to 822 of 6,042 IonQuant-traced ones. In a two-minute window the tallest isotope trace is often another species, and its half-maximum span then excludes the real elution. The species the instrument fragmented is the isolated peak, M+k for the search's isotope offset k, and it is present at the MS2 time by construction; an int span_from anchors there. k=0 is 'mono'. 'strongest' stays available, documented with its failure mode. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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isotope_trace_evidence: integer span_from anchors on the isolated isotope