cDNAs & ORFs

[Mark Bradley]

Dear Netters:
A query: we have pulled a cDNA from testis which contains an ORF for
a sperm antigen.  However we have found a curious(?) poly-T tract 
inframe with the start of the first ATG.  The poly-T tract isapprox
a 30mer.  
Question: does anyone know the significance of the seq prior to the 
first start codon and how common(?) is such a seq in the apparently
non coding region adjacent to a complete ORF.
Any comments would be most welcome

Mark Bradley
CSIRO
Div Wildlife & Ecology
Canberra
Australia
Email: mpb at cbr.dwe.csiro.au