"bond"    "bond"
"cds"    "cds"
"cit"    "cit"
"comment"    "comment"
"exon"    "exon"
"gene"    "gene"
"het"    "het"
"intron"    "intron"
"mat_peptide"    "mat_peptide"
"misc_binding"    "misc_binding"
"misc_feature"    "misc_feature"
"misc_recomb"    "misc_recomb"
"misc_signal"    "misc_signal"
"ncrna_mirna"    "ncrna_mirna"
"nonstdres"    "nonstdres"
"primer_bind"    "primer_bind"
"proprotein"    "proprotein"
"prot"    "prot"
"protein"    "protein"
"protein_bind"    "protein_bind"
"region"    "region"
"secstr"    "secstr"
"sig_peptide"    "sig_peptide"
"site"    "site"
"source"    "source"
"src"    "src"
"transit_peptide"    "transit_peptide"
"unsure"    "unsure"
"variation"    "variation"
"xref"    "xref"