果胶物质分成原生质果胶，果胶和果胶酸。
The pectic substances can be classed protopectins, pectins and pectin acids.
可以区分开来的外部周界是表皮层，由无定形组织的蜡质和果胶构成。
The cuticle exists as the separable outer boundary and consists of a layer of wax and pectin materials that appears to be structureless.
在果胶酶中，原果胶酶、聚半乳糖醛酸酶、裂解酶和果胶酯酶得到了广泛深入的研究。
Extensive study of some pectinase such as protopectinases, polygalacturonases, lyases and pectin esterases has been done up to the present.
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