by Novozymes A/S, Denmark: an amylase, two serine endoproteases (SE
I and SE II), a cellulase/xylanase, and a peroxidase. Stock solutions
were made in PBS 1× (buffer phosphate solution, pH 7.3–7.5)
from Biopack reagents.
For LB medium preparation, yeast extract
and tryptone were obtained from Britania Laboratories, and sodium
chloride was obtained from Biopack. For M63 minimal medium with 0.4%
arginine, H2PO4, K2HPO4, and MgSO4 were provided by Biopack, (NH4)2SO4 was supplied by Anedra, and
free base was provided by Sigma-Aldrich. Deionized water was obtained
by a Double Pass Reverse Osmosis System (Wasserteck, Argentina), with
a resistivity of 1.5 MΩ cm. CV and sugar standards for HPAEC
were provided by Sigma-Aldrich.