Consisting of 25 to 30% of protein in carp, water-soluble sarcoplasmic proteins lost in wash water, have been recovered and freeze-dried into a protein-rich powder. Study objectives were to evaluate protein quality and safety of a silver carp sarcoplasm derived protein powder (CSP) compared to commercial protein supplements, casein, and whey. In vivo protein quality assessment of CSP showed a lower (P < 0.05) protein digestibility corrected amino acid score compared to the commercial protein sources. Despite greater (P < 0.05) fecal amino acid excretion in casein-fed rats, there were no significant differences in liver and muscle amino acid profiles. All low (10% kcal) protein diets supported growth with the normal range. However, whey protein supplementation resulted in greater (P < 0.05) adiposity. CSP, casein, or whey-fed rats showed no differences in major organ weights, renal damage biomarkers, or bone indices. Collectively, results indicated CSP was safe with protein quality comparable to casein. PRACTICAL APPLICATION: As much as 40 percent of protein in fish can be lost due to sarcoplasmic protein solubilization in processing wash water. Silver carp sarcoplasm protein powder may have similar commercial potential as a sustainable and nutritious alternative to whey and casein proteins. This project aimed to verify the protein quality and safety of this economical protein source.

中文翻译：

---

用大鼠模型评价鲢鱼（Hypophthalmichthys molitrix）肌浆蛋白的蛋白质质量和安全性

由鲤鱼中 25% 至 30% 的蛋白质组成，在洗涤水中丢失的水溶性肌浆蛋白已被回收并冷冻干燥成富含蛋白质的粉末。研究目标是与商业蛋白质补充剂、酪蛋白和乳清相比，评估鲢鱼肌浆衍生蛋白粉 (CSP) 的蛋白质质量和安全性。与商业蛋白质来源相比，CSP 的体内蛋白质质量评估显示出较低 (P < 0.05) 的蛋白质消化率校正氨基酸评分。尽管酪蛋白喂养的大鼠粪便氨基酸排泄量更大（P < 0.05），但肝脏和肌肉氨基酸谱没有显着差异。所有低（10% kcal）蛋白质饮食都支持正常范围内的生长。然而，乳清蛋白补充剂导致更大的 (P < 0.05) 肥胖。CSP、酪蛋白、或乳清喂养的大鼠在主要器官重量、肾损伤生物标志物或骨骼指数方面没有差异。总的来说，结果表明 CSP 是安全的，蛋白质质量与酪蛋白相当。实际应用：由于加工洗涤水中的肌浆蛋白溶解，鱼中多达 40% 的蛋白质会丢失。鲢鱼肌浆蛋白粉作为一种可持续且营养丰富的乳清和酪蛋白替代品，可能具有类似的商业潜力。该项目旨在验证这种经济蛋白质来源的蛋白质质量和安全性。由于加工洗涤水中的肌浆蛋白溶解，鱼中多达 40% 的蛋白质会丢失。鲢鱼肌浆蛋白粉作为一种可持续且营养丰富的乳清和酪蛋白替代品，可能具有类似的商业潜力。该项目旨在验证这种经济蛋白质来源的蛋白质质量和安全性。由于加工洗涤水中的肌浆蛋白溶解，鱼中多达 40% 的蛋白质会丢失。鲢鱼肌浆蛋白粉作为一种可持续且营养丰富的乳清和酪蛋白替代品，可能具有类似的商业潜力。该项目旨在验证这种经济蛋白质来源的蛋白质质量和安全性。