Method for extracting intact chloroplast from ginkgo leaves
A technology of Ginkgo biloba leaves and an extraction method, which is applied in the field of biochemistry and can solve the problems of low yield, low chloroplast integrity, difficulty in chloroplast extraction and the like
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[0031] Terms in the present invention are explained as follows:
[0032] Percoll: Percoll is a suspension of silica gel particles treated with polyvinyl pyrrolidone (PVP), which is non-toxic and irritating to cells. The silica gel particles of Percoll suspension are of different sizes. After high-speed centrifugation, a continuous density gradient can be formed to separate and purify cells with different specific gravity. Percoll purchased from Sigma Company is used in the present invention.
[0033] 2× Chloroplast Suspension: refers to double the concentration of the above chloroplast suspension, that is, 40mM Tricine-KOH, 0.6M Sorbitol, 10mM MgCl 2. 6H 2 O, 5mM EDTA-Na 2 .
[0034] 1. Materials and methods
[0035] 1.1 Materials
[0036] Mature leaves of Ginkgo biloba were collected from Xianlin Campus, Nanjing Normal University, Jiangsu Province.
[0037] Extraction Solutions and Media
[0038] Chloroplast Crude Extract: 20mM Tricine-KOH (pH 8.4), 0.45 M Sorbitol, ...
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