"allele"    "allele"
        "assembly_gap" "assembly_gap"
        "attenuator" "attenuator"
        "binding"   "binding"
        "CAAT_signal" "CAAT_signal"
        "CDS"       "CDS"
        "chromosome" "chromosome"
        "conflict"  "conflict"
        "contig"    "contig"
        "C_region"  "C_region"
        "D_loop"    "D_loop"
        "D_region"  "D_region"
        "D_segment" "D_segment"
        "enhancer"  "enhancer"
        "exon"      "exon"
        "gap"      "gap"
        "gene"      "gene"
        "GC_signal" "GC_signal"
        "iDNA"      "iDNA"
        "intron"    "intron"
        "J_region"  "J_region"
        "J_segment" "J_segment"
        "LTR"       "LTR"
        "mat_peptide" "mat_peptide"
        "misc_binding" "misc_binding"
        "misc_difference" "misc_difference"
        "misc_feature" "misc_feature"
        "misc_recomb" "misc_recomb"
        "misc_RNA"  "misc_RNA"
        "misc_signal" "misc_signal"
        "misc_structure" "misc_structure"
        "mobile_element"    "mobile_element"
        "modified_base" "modified_base"
        "ncRNA"      "ncRNA"
        "mRNA"      "mRNA"
        "mutation"  "mutation"
        "N_region"  "N_region"
        "old_sequence" "old_sequence"
        "operon"    "operon"
        "oriT"      "oriT"
        "polyA_signal" "polyA_signal"
        "polyA_site" "polyA_site"
        "precursor_RNA" "precursor_RNA"
        "primer"    "primer"
        "primer_bind" "primer_bind"
        "prim_transcript" "prim_transcript"
        "promoter"  "promoter"
        "protein_bind" "protein_bind"
        "RBS"       "RBS"
        "regulatory"    "regulatory"
        "repeat_region" "repeat_region"
        "repeat_unit" "repeat_unit"
        "rep_origin" "rep_origin"
        "rRNA"      "rRNA"
        "satellite" "satellite"
        "scRNA"     "scRNA"
        "sig_peptide" "sig_peptide"
        "snoRNA"    "snoRNA"
        "snRNA"     "snRNA"
        "source"    "source"
        "S_region"  "S_region"
        "stem_loop" "stem_loop"
        "STS"       "STS"
        "TATA_signal" "TATA_signal"
        "telomere"    "telomere"
        "terminator" "terminator"
        "transit_peptide" "transit_peptide"
        "tmRNA"      "tmRNA"
        "tRNA"      "tRNA"
        "unsure"    "unsure"
        "variation" "variation"
        "virion"    "virion"
        "V_region"  "V_region"
        "V_segment" "V_segment"
        "3'clip"    "3\'clip"
        "3'UTR"     "3\'UTR"
        "5'UTR"     "5\'UTR"
        "5'clip"    "5\'clip"
        "-10_signal" "-10_signal"
        "-35 signal" "-35 signal"