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Nucleic Acid Labeling
How can the quality of DNA labeling by Enzo’s CGH labeling kits be analyzed?
We recommend using a NanoDrop UV-VIS Spectrophotometer in the microarray measurement mode to determine yield and dye incorporation. Use 1.5…
Tue, Jul 18, 2023
Which reference DNA can be used with Enzo’s CGH labeling kits?
Every high quality intact genomic DNA of healthy individuals may be used as a reference. Human male (ENZ-GEN106) and female…
Tue, Jul 18, 2023
Which kit would work for labeling DNA fragments for an microarray?
BIOARRAY® Terminal labeling kit with biotin-ddUTP for DNA probe array assays, ENZ-42630 is the gold standard for end-labeling in microarrays…
Tue, Jul 18, 2023
What are the standard QC parameters this kit must accommodate?
For a typical labeling reaction with an input of 500 ng of high quality genomic DNA, the yield should be…
Tue, Jul 18, 2023
Can DNA labeled with the Enzo Life Sciences kit be used on a Roche NimbleGen™ platform?
Yes, it can be used. It has been noted by cytogenetics labs that Enzo’s CGH labeling kit works perfectly well…
Tue, Jul 18, 2023
Good DLRs in the CGH analytics QC report, but some oligos show whiskering or significant deviation from the expected log2 ratio
We suggest keeping the Cot-1 DNA at 50 µg regardless of the hybridization volume.
Tue, Jul 18, 2023
Poor signal to noise ratio despite good incorporation
Low signal can be caused by inappropriate hybridization conditions (too stringent buffer or excessive temperature) or when the hybridization time…
Tue, Jul 18, 2023
Overview
Array comparative genomic hybridization (aCGH) is a powerful diagnostic tool for detecting DNA copy number gains and losses associated with…
Tue, Jul 18, 2023
Low yield and incorporation
Poor labeling often reflects low quality input DNA. This can be due to the presence of contaminants from the purification…
Tue, Jul 18, 2023
Bright yellow array with reduced magnitude of expected changes
This can be due to insufficient Cot-1 DNA, blocking agents or hybridization and washing conditions that are not stringent enough.
Tue, Jul 18, 2023