An exopolygalacturonase was separated from a mycelial extract of Aspergillus niger with a 290-fold purification and a recovery of 8.6%. 2. The enzyme displayed its full activity only in the presence of Hg(2+) ions; K(A) for mercuric chloride was about 6x10(-8)m. 3. The mercury-activated enzyme progressively removed the terminal galacturonic acid residues from alpha-(1-->4)-linked galacturonide chains and converted digalacturonic acid, trigalacturonic acid, tetragalacturonic acid and pectic acid into galacturonic acid.
No takes yet. Share an insight, caveat, or question.
PJ Mill (1966) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: