diff --git a/etc/key_mapping b/etc/key_mapping
index 6edf13c12c51ec79e3f7f61caab7983f032bcb53..d81e496325ed47163b7a7ecfdf10e45bf49e7423 100644
--- a/etc/key_mapping
+++ b/etc/key_mapping
@@ -1,15 +1,20 @@
 # CHADO (SO) database key mappings (used for writing out to file)
 #
-# CHADO                 	map to 		    qualifier (optional)
-pseudogenic_transcript      mRNA            pseudo
-pseudogenic_exon            CDS             pseudo
-pseudogene                  gene            pseudo
-polypeptide_motif           CDS_motif
-five_prime_UTR              5'UTR
-three_prime_UTR             3'UTR
-polypeptide_domain          CDS_domain
-region                      misc_feature
-remark                      misc_feature
-sequence_difference         misc_feature
-SECIS_element               misc_feature    note=SECIS_element
-contig                      source
\ No newline at end of file
+# CHADO                                    map to 	    qualifier (optional)
+pseudogenic_transcript                     mRNA            pseudo
+pseudogenic_exon                           CDS             pseudo
+pseudogene                                 gene            pseudo
+polypeptide_motif                          CDS_motif
+five_prime_UTR                             5'UTR
+three_prime_UTR                            3'UTR
+polypeptide_domain                         CDS_domain
+region                                     misc_feature
+remark                                     misc_feature
+sequence_difference                        misc_feature
+SECIS_element                              misc_feature    note=SECIS_element
+contig                                     source
+PCR_product                                misc_feature    note=PCR_product
+dinucleotide_repeat_microsatellite_feature misc_feature    note=dinucleotide_repeat_microsatellite_feature
+EST_match                                  misc_feature    note=EST_match
+match_part                                 misc_feature    note=match_part
+direct_repeat                              misc_feature    note=direct_repeat
\ No newline at end of file