Process for xylanase production

摘要

The invention provides a process of obtaining a xylanase, said process comprising: providing a protein-containing extract of a transplastomic plant tissue comprising plastids transformed with a polynucleotide encoding said xylanase, said extract having been subjected to heat treatment that has denatured at least some of the protein content of said tissue but under which the xylanase has remained stable; and recovering said xylanase from said extract.