Abstract: The sweet protein (mabinlin) was showed to be the major storage protein of Capparis masaikai Levl. seeds. It located in protein bodies of emb-ryonic axis cells and accotinted for about 90% of their total protein. The rou- nd protein body was 2-10 um in size and had inclusions of globoids but no crystalloid. As a very basic albumin, the sweet protein accumulated in the ma- trix of protein bodies in combination with a very acidic compound 2-hydrosyl -ethyl-glucosinolate. In matrix also located the acid phosphatase. Globoids were not rigid in size, and were composed mainly of the K salt of phytic acid.

Key words: Sweet protein

摘要： 甜蛋白 mabinlin是马槟榔（Capparis masaikai Lёvl.）种子的主要储存蛋白。它位于胚轴细胞的蛋白体中，其含量为蛋白体总蛋白的90％。圆形蛋白体直径约2—10 um，内含许多球粒体（globoid)，但无类晶体（crystalloid）。作为二种强碱性清蛋白，甜蛋白与一种强酸性化合物2-羟乙基葡硫甙磺酸（2-hydroxy-ethyl-glucosinolate）结合为可溶性盐，组成蛋白体的衬质（matrix）。衬质中还有酸性磷酸酯酶。

关键词: 甜蛋白, 蛋白体