<s>
Webtag	B-Application
is	O
an	O
on-line	O
bioinformatics	O
tool	O
providing	O
oligonucleotide	O
sequences	O
(	O
usually	O
called	O
tags	O
or	O
anchors	O
)	O
that	O
are	O
absent	O
from	O
a	O
specified	O
genome	O
.	O
</s>
<s>
It	O
is	O
also	O
a	O
significant	O
improvement	O
since	O
Webtag	B-Application
takes	O
into	O
account	O
the	O
interactions	O
of	O
the	O
tag	O
with	O
the	O
primers	O
to	O
be	O
used	O
in	O
the	O
experiment	O
.	O
</s>
<s>
Webtag	B-Application
generates	O
tags	O
that	O
combine	O
genome	O
absence	O
with	O
good	O
priming	O
properties	O
for	O
RT-PCR	O
based	O
experiments	O
.	O
</s>
