Multiple Forms of Pectinesterase are Present in Tomato and Other Fruit

Total PE levels in Fruit

Image of miscellaneous fruit

Figure 2. Total PE enzyme activities in a range of fruit.

Total PE levels in a number of fruit were calculated using an autotitrator. As may be seen in Graph 2, PE appears to be present in all of the samples assayed, although in varying quantities. Tomato has a very high level of PE, hence its use in studies on PE. These figures can only be taken as a rough guide to the total activity as the extractions were not optimised for each fruit. For example, we have found the extraction of PE from strawberry to be most effective at pH 9.

Multiple Forms of Pectinesterase are Present in Tomato and Other Fruit

Total PE levels in Fruit

Further Reading