Sense-antisense gene overlap is probably a cause for retaining the few introns in Giardia genome and the implications

Table 1 The integrated information of the eight spliceosome-mediated introns and their host genes and complementary strands

Intron-containing gene			Intron		Complementary strand
Gene ID	Product	Age	Age	Size (bp)	Complementary strand
GL50803–27266	2Fe-2S ferredoxin	ancient	later evolved	35	No ORF, no transcripts detected
GL50803–15604	26S proteasome non-ATPase regulatory subunit 4		ancient	29	No ORF, no transcripts detected
GL50803–15124	Dynein light chain			32	No ORF, no transcripts detected
GL50803–17244	Ribosomal Protein L7A			109	Antisense gene with transcripts
GL50803–37070	Hypothetical protein	later evolved	later evolved	41	Antisense gene with transcripts
GL50803–35332	Hypothetical protein			220	No ORF, no transcripts detected
GL50803–15525	Hypothetical protein			33	No ORF, no transcripts detected
GL50803–86945	Hypothetical protein			36	No ORF, no transcripts detected

ISSN: 1745-6150