Search PaperBLAST for literature about proteins, find characterized proteins by function via Curated BLAST, and check metabolic pathway gaps with GapMind. Use when: (1) user asks about papers or literature for a protein or gene, (2) user wants to find characterized proteins matching a functional description, (3) user asks about amino acid biosynthesis or carbon source utilization capability of an organism, (4) user mentions PaperBLAST, GapMind, or Curated BLAST, (5) user wants to annotate hypothetical proteins using literature evidence. Wraps papers.genomics.lbl.gov CGI tools via MCP server.