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The use of dry weight measurements for quantification of the stock solutions is a crude and in-accurate means of protein quantification. Often times in commercially purchased peptides greater than 10% of the dry weight is constituted from salts and residual water (the % purity values indicated by the manufacturers relate to what % of all peptide material in the vial is the target peptide - it does not indicate what percent of all dry weight is the target peptide). ÎÒÊÇÓñê×¼ÎïÖÊÅäÖñê×¼ÈÜÒº½¨Á¢±ê×¼ÇúÏß È»ºó¶Ô´Öµ°°×ÖÊÑùÆ·ÖеÄÕâ¸ö±ê×¼ÎïÖʽøÐж¨Á¿ 1.Éó¸åÈËΪʲô˵ÎÒÊDZê×¼ÈÜÒºµÄ¶¨Á¿°¡£¿ 2.ÎÞÂÛÑùÆ·×é³ÉÈçºÎ£¬Ö»ÒªÊÇÎÒ½¨Á¢µÄ´®ÁªÖÊÆ×·½·¨ºÏÊÊ£¬¾Í¿ÉÒÔ½ø¶¨Á¿°¡ ºÍÔÓÖÊÎ޹ذ¡ |
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l348704462
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2Â¥2010-03-24 09:48:56
liuheguang
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3Â¥2010-03-24 13:15:02
wittyboy
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4Â¥2010-03-24 13:30:28
bear2007
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wittyboy(½ð±Ò+2):лл 2010-03-31 22:13
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The use of dry weight measurements for quantification of the stock solutions is a crude and in-accurate means of protein quantification. ³Æ¸ÉÎïÖÊÅäÖñê×¼±È½Ï´ÖÂÔ£¬ÔÚµ°°×Öʶ¨Á¿Öв»¾«È· Often times in commercially purchased peptides greater than 10% of the dry weight is constituted from salts and residual water ͨ³£¹ºÂòµÄPEpÖг¬¹ý10%µÄÊÇÑκÍË®·Ö (the % purity values indicated by the manufacturers relate to what % of all peptide material in the vial is the target peptide - it does not indicate what percent of all dry weight is the target peptide). ÉÌÆ·µÄ´¿¶ÈÖ¸µÄÊÇËùÓÐpeptideÖк¬Ëùº¬ÓÐÄ¿µÄpepµÄ°Ù·Ö±È£¨target peptide £©£¬¶ø²»ÊǾ»ÖØÖк¬ÓÐÄ¿µÄpepµÄ°Ù·Ö±È¡£ ¾»ÖØ* X% Òª´óÓÚÄ¿µÄpepº¬Á¿¡£ÒòΪpeptideÖÖÀàÒ²½Ï¶à°É£¬ºÇºÇ ![]() ¾ÍÏñ ÂÈ»¯ÄÆÂÈ»¯¼Ø±ù¹÷£¨ÂÈ»¯ÄÆ´¿¶È98%£¬Ó¦¸ÃÊÇÖ¸Õ¼×ÜÑεıÈÀý£©£¬ÄãÒª¼ÆËãʳÑεĺ¬Á¿£¬ÄãÒª³ýȥˮ£¬»¹Òª³ýÈ¥ÂÈ»¯¼Ø [ Last edited by bear2007 on 2010-3-24 at 14:13 ] |

5Â¥2010-03-24 14:09:51














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