阿根廷培育转基因奶牛 能产人奶
<p>阿根廷国家农业综合科技研究所的科学家们日前宣布，他们已成功培育出一头能够产人奶的奶牛，这在全世界范围内尚属首例。据科学家介绍，这头奶牛名叫罗西塔，出生前就已在体内植入了两种人类母乳的基因，这两种基因都是人类在哺乳期乳腺才能分泌的蛋白质，这样它产出的奶中所含的蛋白质就会与人奶中的相同。科学家表示，培育这种转基因奶牛是为了提高牛奶的营养价值，人奶中的蛋白质可为新生儿提供抗菌与抗病毒的保护，这种牛奶也能做到。</p><p><span word="Scientists">Scientists</span> <span word="in">in</span> <span word="Argentina">Argentina</span> <span word="have">have</span> <span word="created">created</span> <span word="the">the</span> <span word="world">world</span>’<span word="s">s</span> <span word="first">first</span> <span word="cow">cow</span> <span word="to">to</span> <span word="boast">boast</span> <span word="two">two</span> <span word="human">human</span> <span word="genes">genes</span> <span word="that">that</span> <span word="will">will</span> <span word="enable">enable</span> <span word="it">it</span> <span word="to">to</span> <span word="produce">produce</span> <span word="human">human</span>-<span word="like">like</span> <span word="milk">milk</span>.</p><p><span word="Genetic">Genetic</span> <span word="engineering">engineering</span> <span word="was">was</span> <span word="used">used</span> <span word="to">to</span> <span word="introduce">introduce</span> <span word="the">the</span> “<span word="mothers">mothers</span>’ <span word="milk">milk</span>” <span word="genes">genes</span> <span word="into">into</span> <span word="the">the</span> <span word="animal">animal</span> <span word="before">before</span> <span word="birth">birth</span>, <span word="according">according</span> <span word="to">to</span> <span word="the">the</span> <span word="National">National</span> <span word="Institute">Institute</span> <span word="of">of</span> <span word="Agribusiness">Agribusiness</span> <span word="Technology">Technology</span> <span word="in">in</span> <span word="Buenos">Buenos</span> <span word="Aires">Aires</span>.</p><p><span word="As">As</span> <span word="an">an</span> <span word="adult">adult</span> <span word="the">the</span> <span word="cloned">cloned</span> <span word="cow">cow</span> “<span word="will">will</span> <span word="produce">produce</span> <span word="milk">milk</span> <span word="that">that</span> <span word="is">is</span> <span word="similar">similar</span> <span word="to">to</span> <span word="humans">humans</span>” <span word="in">in</span> <span word="what">what</span> <span word="will">will</span> <span word="prove">prove</span> “<span word="a">a</span> <span word="development">development</span> <span word="of">of</span> <span word="great">great</span> <span word="importance">importance</span> <span word="for">for</span> <span word="the">the</span> <span word="nutrition">nutrition</span> <span word="of">of</span> <span word="infants">infants</span>”, <span word="it">it</span> <span word="said">said</span> <span word="in">in</span> <span word="a">a</span> <span word="statement">statement</span>.</p><p>“<span word="The">The</span> <span word="cloned">cloned</span> <span word="cow">cow</span>, <span word="named">named</span> <span word="Rosita">Rosita</span> <span word="ISA">ISA</span>, <span word="is">is</span> <span word="the">the</span> <span word="first">first</span> <span word="bovine">bovine</span> <span word="born">born</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span> <span word="that">that</span> <span word="incorporates">incorporates</span> <span word="two">two</span> <span word="human">human</span> <span word="genes">genes</span> <span word="that">that</span> <span word="contain">contain</span> <span word="the">the</span> <span word="proteins">proteins</span> <span word="present">present</span> <span word="in">in</span> <span word="human">human</span> <span word="milk">milk</span>,” <span word="the">the</span> <span word="statement">statement</span> <span word="said">said</span>.</p><p><span word="In">In</span> <span word="April">April</span> <span word="scientists">scientists</span> <span word="in">in</span> <span word="China">China</span> <span word="published">published</span> <span word="details">details</span> <span word="of">of</span> <span word="research">research</span> <span word="showing">showing</span> <span word="that">that</span> <span word="they">they</span> <span word="had">had</span> <span word="created">created</span> <span word="GM">GM</span> <span word="Holstein">Holstein</span> <span word="dairy">dairy</span> <span word="cows">cows</span> <span word="which">which</span> <span word="produced">produced</span> <span word="milk">milk</span> <span word="containing">containing</span> <span word="proteins">proteins</span> <span word="found">found</span> <span word="in">in</span> <span word="human">human</span> <span word="breast">breast</span> <span word="milk">milk</span>.</p>
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