Constant REF_PNCA 

const REF_PNCA: &str = ">NC_000962.3:c2289291-2288681 Mycobacterium tuberculosis H37Rv, complete genome\nGCGTCGGTAGGCAAACTGCCCGGGCAGTCGCCCGAACGTATGGTGGACGTATGCGGGCGTTGATCATCGT\nCGACGTGCAGAACGACTTCTGCGAGGGTGGCTCGCTGGCGGTAACCGGTGGCGCCGCGCTGGCCCGCGCC\nATCAGCGACTACCTGGCCGAAGCGGCGGACTACCATCACGTCGTGGCAACCAAGGACTTCCACATCGACC\nCGGGTGACCACTTCTCCGGCACACCGGACTATTCCTCGTCGTGGCCACCGCATTGCGTCAGCGGTACTCC\nCGGCGCGGACTTCCATCCCAGTCTGGACACGTCGGCAATCGAGGCGGTGTTCTACAAGGGTGCCTACACC\nGGAGCGTACAGCGGCTTCGAAGGAGTCGACGAGAACGGCACGCCACTGCTGAATTGGCTGCGGCAACGCG\nGCGTCGATGAGGTCGATGTGGTCGGTATTGCCACCGATCATTGTGTGCGCCAGACGGCCGAGGACGCGGT\nACGCAATGGCTTGGCCACCAGGGTGCTGGTGGACCTGACAGCGGGTGTGTCGGCCGATACCACCGTCGCC\nGCGCTGGAGGAGATGCGCACCGCCAGCGTCGAGTTGGTTTGCAGCTCCTGA\n\n>NC_002945.4:c2277615-2277005 Mycobacterium tuberculosis variant bovis AF2122/97 chromosome Mycobacterium_bovis_AF212297, complete sequence\nGCGTCGGTAGGCAAACTGCCCGGGCAGTCGCCCGAACGTATGGTGGACGTATGCGGGCGTTGATCATCGT\nCGACGTGCAGAACGACTTCTGCGAGGGTGGCTCGCTGGCGGTAACCGGTGGCGCCGCGCTGGCCCGCGCC\nATCAGCGACTACCTGGCCGAAGCGGCGGACTACCATCACGTCGTGGCAACCAAGGACTTCCACATCGACC\nCGGGTGACGACTTCTCCGGCACACCGGACTATTCCTCGTCGTGGCCACCGCATTGCGTCAGCGGTACTCC\nCGGCGCGGACTTCCATCCCAGTCTGGACACGTCGGCAATCGAGGCGGTGTTCTACAAGGGTGCCTACACC\nGGAGCGTACAGCGGCTTCGAAGGAGTCGACGAGAACGGCACGCCACTGCTGAATTGGCTGCGGCAACGCG\nGCGTCGATGAGGTCGATGTGGTCGGTATTGCCACCGATCATTGTGTGCGCCAGACGGCCGAGGACGCGGT\nACGCAATGGCTTGGCCACCAGGGTGCTGGTGGACCTGACAGCGGGTGTGTCGGCCGATACCACCGTCGCC\nGCGCTGGAGGAGATGCGCACCGCCAGCGTCGAGTTGGTTTGCAGCTCCTGA\n\n>NC_015848.1:c2339066-2338456 Mycobacterium canetti CIPT 140010059, complete sequence\nGCGTCGGTAGGCAAACTGCCCGGGCAGTCGCCCGAACGTATGGTGGACGTATGCGGGCGTTGATCATCGT\nCGACGTGCAGAACGACTTCTGCGAGGGTGGCTCGCTGGCGGTAACCGGTGGCGCCGCGCTGGCCCGCGCC\nATCAGCGACTACCTGGCCGAAGCGGCGGACTACCATCACGTCGTGGCGACCAAGGACTTCCACATCGACC\nCGGGTGACCACTTCTCCGGCACACCGGACTATTCCTCGTCGTGGCCACCGCATTGCGTCAGCGGTACTCC\nCGGCGCGGACTTCCATCCCAGTCTGGACACGTCGGCAATCGAGGCGGTGTTCTACAAGGGTGCCTACACC\nGGAGCGTACAGCGGCTTCGAAGGAGTCGACGAGAACGGCACGCCACTGCTGAATTGGCTGCGGCAACGCG\nGCGTCGATGAGGTCGACGTGGTCGGTATTGCCACCGATCATTGTGTGCGCCAGACGGCCGAGGACGCGGT\nACGCAATGGCTTGGCCACCAGGGTGCTGGTGGACCTGACAGCGGGTGTGTCGGCCGATACCACCGTCGCC\nGCGCTGGAGGAGATGCGCACCGCCAGCGTCGAGTTGGTTTGCAGCTCCTGA\n\n";

pncA CDS + 50bp upstream promoter flank for each M. tuberculosis complex member with a distinct reference sequence, fetched from NCBI at build time (see pnca module docs). Concatenated into one multi-FASTA so identify_sequence_pnca() can search all of them via parse_multi_fasta, the same way identify_sequence_rrl_ntm() searches REF_MYCO_RRL.