What does yeast do to Pectic enzyme?
 

I notice there is a time allowed for pectic enzyme to work before
adding yeast normally 12-24 hours.

What happens when you add the yeast?

Does the pectic enzyme have to do all of it's work prior to yeast being
added and the yeast overpowers it...or does it just need a head
start....or does the yeast eat it?

John F

Yeast do produce some proteolytic enzymes that will destroy the pectic
enzyme although not much. The alcohol produced byut the yeast will
inhibit pectinase activity as well as will the drop in pH. Most
commercially pectinases are microbially produced and have a pH optimum
of around 4-5.

So basically, they just work better when pectinase is added first.