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Large Heat-Labile Proteins Class III

These are greater than 30 kDa in size examples are helveticin J, helveticin V, acidophilicin A, lactacins A and B [52 - 56]. [Pg.24]

A fourth class, proposed by Klaenhammer [21] is rather questionable. This class comprised the complex bacteriocins, composed of protein plus one or more chemical moieties (lipid, carbohydrate) required for activity plantaricin S, leuconocin S, lactocin 27, pediocin SJ-1 [57-61]. The existence of this fourth class was supported by the observation that some bacteriocin activities were destroyed by glycolytic and lipolytic enzymes [60]. However, such bacteriocins have not yet been characterized adequately at the biochemical level and the recognition of this class therefore seems to be premature. The class IIC of the Klaenhammer [21] classification has recently been shown not to exist. [Pg.24]


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