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Spindle fiber attachments (SFAs) were enriched in a fraction of nuclei isolated from mouselivers. The enrichment method combines sonication, treatment with 2 mol/L NaCl and highspeed centrifugation. SFA was enriched 27-fold on the average (n = 4) when measured byradioimmunoassay. The basic method offers opportunities for further increases of yield andfor the enrichment of SFA uf other vertebrates. 相似文献
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