Preview: Unable to save mix of unresolved nucleotides and nucleotides to Sequence (and FASTA)

[AlexeyGirin]

Steps to Reproduce

1. Go to Macromolecules mode - Flex mode
2. Open from file: Unable to save mix of unresolved nucleotides and nucleotides to sequence.zip OR create manually the following canvas:
3. Save canvas to Sequence format file (or FASTA)

Actual behavior System throws an exception: Convert error! Error during sequence type recognition(RNA, DNA or Peptide) Sequence: FASTA:

Expected behavior Since unresolved nucleotide is nucleotide - it should be recognized as DNA

Versions

• Ketcher Version 2.22.0-rc.2 Build at 2024-06-28; 05:30:15
• Indigo Toolkit Version 1.22.0-dev.2.1-gd5637f75-wasm32-wasm-clang-12.0.0
• Windows 10 Pro
• Chrome Version 126.0.6478.127 (Official Build) (64-bit)

Issue found while testing - https://github.com/epam/ketcher/issues/4382

[AlexeyGirin]

@rrodionov91 's comment on that: This is because we don't have classHELM field for the unsplite nucleotide. We have to add it and allow user to decide if it is RNA or DNA

[AlexeyGirin]

MOved to Ketcher - https://github.com/epam/ketcher/issues/5030