蛋白质的生物功能·酶催化·结构蛋白收缩蛋白（肌球蛋白、肌动蛋白、微管蛋白），激素（胰岛素、生长激素）、传递蛋白（血清蛋白、铁传递蛋白、血红蛋白）·抗体（免疫球蛋白）购藏蛋白（蛋清蛋白、种子蛋白）·保护蛋白（毒素和过敏素）11
蛋白质的生物功能 • 酶催化 • 结构蛋白 • 收缩蛋白（肌球蛋白、肌动蛋白、微管蛋白） • 激素（胰岛素、生长激素） • 传递蛋白（血清蛋白、铁传递蛋白、血红蛋白） • 抗体（免疫球蛋白） • 贮藏蛋白（蛋清蛋白、种子蛋白） • 保护蛋白（毒素和过敏素） 11
食品蛋白质·易于消化·无毒·富有营养·显示功能特性·来源丰富12
食品蛋白质 • 易于消化 • 无毒 • 富有营养 • 显示功能特性 • 来源丰富 12
Food proteins: All biologically produced proteins can beused as food proteins.: For practical purposes, food proteins maybe defined as those that are easilydigestible, nontoxic, nutritionally adequatefunctionally useable in food products, andavailableinabundance13
Food proteins • All biologically produced proteins can be used as food proteins. • For practical purposes, food proteins may be defined as those that are easily digestible, nontoxic, nutritionally adequate, functionally useable in food products, and available in abundance. 13
. Traditionally, milk, meats (including fishand poultry), eggs, cereals, legumes, andoilseeds have been the major sources offood proteins14
• Traditionally, milk, meats (including fish and poultry), eggs, cereals, legumes, and oilseeds have been the major sources of food proteins. 14
: Because of the burgeoning worldpopulation, nontraditional sources ofproteins for human nutrition need to bedeveloped to meet the future demand.: The suitability of such new protein sourcesfor use in foods depends on their cost andtheir ability to fulfill the normal role ofprotein ingredients in processed andhome-cooked foods.15
• Because of the burgeoning world population, nontraditional sources of proteins for human nutrition need to be developed to meet the future demand. • The suitability of such new protein sources for use in foods depends on their cost and their ability to fulfill the normal role of protein ingredients in processed and home-cooked foods. 15