Enzymes pectic, classification

Classification of Depolymerizing Pectic Enzymes According to Neukom5... 

Investigations of pectic enzymes conducted during the past few years have shown that the classification system due to Neukom5 is no longer adequate. Thus, the hypothetical enzymes degrading highly... 

The classification of pectic enzymes in general, their occurrence in higher plants and micro-organisms and the properties of pectic enzymes from some plants and food grade micro-organisms are described with special emphasis on their substrate specificity. Their technological roles and applications, also in combination with (hemi-)cellulases, in a variety of processes are discussed. Evidence is presented for the existence of a new type of pectic enzyme which acts specifically in the hairy regions of pectic substances. 

Much of the confusion in pectic enzyme terminology was clarified by Demain and PhaflF in 1957 12) and Deuel and Stutz in 1958 11). Their classification of depolymerases was based on the substrate attacked (pectin m. non-esterified polygalacturonic acid), the mode of attack (random or endo attack vs. terminal or exo attack), and the optimal pH for enzyme activity. However it was assumed that hydrolysis was the... 

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