1	retained_intron	exon	153218922	153332786	.	-	.	gene_id "ENSMUSG00000026478"; transcript_id "ENSMUST00000159251"; exon_number "4"; gene_name "Lamc1"; gene_biotype "protein_coding"; transcript_name "Lamc1-002"; exon_id "ENSMUSE00000855838";
