上游充通大 SHANGHAI JIAO TONG UNIVERSITY IIl.DNA-Binding Proteins and Regulation of Transcription by Negative and Positive Control (Transcriptional level regulation) 转录水平调控 CHEN FENG,School of Life Sciences and Biotech.CHEN FENG，School of Life Sciences and Biotech. III. DNA-Binding Proteins and Regulation of Transcription by Negative and Positive Control (Transcriptional level regulation) 转录水平调控