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Efficient and Reliable Linear,,, Amplification of cRNA

ding to Supplier As recommendations. For all samples, 10 g labeled cRNA was hybridized to HG-U133A GeneChip Arrays. To estimate the performance of the T7 amplification, the yield of biotin-labeled cRNA and the hybridization results obtained from HG-U133A GeneChip Arrays were analyzed (Table 1).

Fast Procedure with High Efficiency

The yield of labeled cRNA is slightly lower for three out of four samples using the RAS Microarray Kits. However, both reaction volume (20 l vs. 40 l) and reaction time (2 hours vs. 4 hours) are reduced by half with the RAS Microarray RNA Target Synthesis Kit (T7) compared to the approach of Supplier A, indicating the higher efficiency and swifter procedure provided by the kit. In addition, the RAS Microarray Target Purification Kit simplifies the cDNA/cRNA purification steps of the Eberwine protocol.

The hybridization data obtained from the HG-U133A GeneChip Arrays show a higher number of present calls for the labeled cRNA that was generated with the RAS Microarray RNA Target Synthesis Kit (T7), signifying increased sensitivity. The kit protocol is economically optimized for the incorporation of only one labeled nucleotide (e.g., Biotin-UTP), and our results indicate that there is no further improvement of sensitivity by additional labeled nucleotides.

Furthermore, the 3′ 5′ ratio of glyceraldehyde 3-phosphate dehydrogenase (GAPDH) displays a lower ratio for these targets, demonstrating the larger amount and integrity of full-length cRNA targets achieved when using the RAS Microarray RNA Target Synthesis Kit (T7) for linear amplification and labeling.

The use of the RAS Microarray Kits demonstrates a more effici
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