DSL

lollipopDiagram
  gene <NAME>
  length <N>              # total track length in coordinate units; optional (else inferred from max position)
  exon <start> <end> [label]
  variant <label> <pos> <class>

Variant classes → colors** (standard palette):

class | color | meaning | |---|---|---| | missense | green | amino-acid substitution | | nonsense | red | premature stop | | frameshift | purple | indel shifting reading frame | | splice | orange | splice-site | | synonymous | gray | silent

• Coordinate units - protein/aa

Real worls examples

lollipopDiagram
  gene TP53
  length 393
  exon 94 312 DNA-binding
  variant R175H 175 missense
  variant R248Q 248 missense
  variant R273H 273 missense
  variant R213* 213 nonsense

SVG layout

• width 800, height ~200, padding 40
• pos → padding + (pos/length) * (800 - 2*padding)