求助两篇nature的文章

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A defined glycosaminoglycan-binding substratum for human pluripotent stem cells) i0 |5 v) V( ^1 V' v6 y
http://www.nature.com/nmeth/journal/v7/n12/pdf/nmeth.1532.pdf' R4 s& q: D3 c4 T0 L4 O1 ]
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An optimized small molecule inhibitor cocktail supports long-term maintenance of human embryonic stem cells
4 z0 u' `. l) R4 l$ whttp://www.nature.com/ncomms/journal/v2/n1/abs/ncomms1165.html