TY - STD TI - Nature Biotechnology, [http://www.nature.com/naturebiotechnology] UR - http://www.nature.com/naturebiotechnology ID - ref1 ER - TY - STD TI - ToolGen Inc. , [http://www.toolgen.com] UR - http://www.toolgen.com ID - ref2 ER - TY - STD TI - Zinc finger proteins as designer transcription factors. ID - ref3 ER - TY - STD TI - Selection of peptides that functionally replace a zinc finger in the Sp1 transcription factor by using a yeast combinatorial library. ID - ref4 ER -