cDNA is longer than mRNA? - ensemb's result (Jul/11/2005 )
Okey, i am looking for c-fos gene from human.
I came to this site which gives me the cDNA sequence below "Export Data": 2103bp
When i clicked on" RefSeq dna: NM_005252.2" under the section " Similarity Matches" then i came to this link:
which says that mRNA is 2084bp.
My question: why is cDNA longer than mRNA sequence? Should it not be the opposite?
Hope for any inputs.
cDNA and mRNA sequence is the same. Ensembl cDNA sequence has 19 extra base at the 3' most end (3UTR). This discrepancy is caused by different algorithms used to predict the cDNA. I will trust more the NCBI refseq which is human curated.
Also the cDNA sequence might contain vector sequence.