Biological Sequence Retrieval Retrieve DNA, RNA, and protein sequences with proper disambiguation and cross-database handling. IMPORTANT : Always use English terms in tool calls. Only try original-language terms as fallback. Respond in the user's language. LOOK UP DON'T GUESS : Never assume accession numbers or sequence versions. Always retrieve and verify from NCBI or ENA. Domain Reasoning Sequence quality hierarchy: RefSeq (NM /NP = curated) RefSeq predicted (XM /XP ) GenBank (submitted). Prefer the MANE Select transcript for human canonical isoforms. Check version numbers -- annotations im…