NSP Degrading Enzymes Flashcards
(15 cards)
What is the role of enzymes in the mash if the malt specification is correct?
The next set of enzymes shouldn’t be required in the mash.
Which group of enzymes is renowned for being the most heat labile?
β-Glucanases
What is the action of endo-β-(1,3)-glucanase in mashing?
It catalyses the hydrolysis of β-glucan chains with sequences of consecutive (1,3)-β-bonds.
Why is endo-β-(1,3)-glucanase considered a weak enzyme?
Its action in mashing is minor.
What type of bonds does endo-β-(1,4)-glucanase catalyse?
β-(1,4) bonds.
What happens to endo-β-(1,4)-glucanase during kilning?
A limited amount survives kilning.
At what temperature does endo-β-(1,4)-glucanase degrade β-glucan chains?
40°C
What is the full name of barley β-glucanase?
Endo β-(1,3;1,4)-β-glucan 4-glucanohydrolase.
What does barley β-glucanase produce when it catalyses the hydrolysis of β-(1,4)-bonds?
Oligosaccharides.
What is the optimum temperature for barley β-glucanase?
40°C
Which enzymes are responsible for the degradation of pentosans?
- Arabinosidase
- Xylobiase
What is the most heat stable enzyme responsible for pentosan degradation?
Xylobiase
What is the effect of lower temperature stands on the concentration of arabinose and xylose in mashes?
The concentration of arabinose and xylose is higher.
Fill in the blank: The concentration of arabinose and xylose is higher in mashes with _______ temperature stands.
lower
True or False: The optimum temperatures of the enzymes responsible for pentosan degradation are higher than those of the enzymes of starch conversion.
False
