Example
of a Pregnancy Test
Urine added to
window
If patient is
not pregnant there is
no HCG to bind to vertical line of anti-HCG
When labeled
anti-HCG is added it
has no bound HCG to attach
to so when substrate is added no color develops
The horizontal
line has HCG attached
so when labeled anti- HCG
is added it is bound to HCG so when substrate is added color develops
If patient is
pregnant there is
HCG to bind to
vertical line of anti- HCG
When labeled
anti-HCG is added it
binds to HCG and
when substrate is added
color develops
