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Genomic Analysis
How should I determine DNA concentration before labeling with Enzo’s CGH labeling kits?
We recommend determining concentration and purity of the genomic DNA using the nucleic acid module of a NanoDrop UV-VIS Spectrophotometer…
Tue, Jul 18, 2023
What is the starting concentration of DNA needed for labeling with the CGH labeling kit for oligo arrays?
We suggest using 0.25 – 2.5 µg of input genomic DNA in a maximum volume of 19 µl, hence a…
Tue, Jul 18, 2023
Does genomic DNA need to be fragmented for labeling with Enzo’s CGH labeling kits?
Restriction digestion or fragmentation of the isolated genomic DNA is not required prior to labeling with our CYTAG® CGH (ENZ-42671)…
Tue, Jul 18, 2023
What is the required fragment length of input DNA for labeling with Enzo’s CGH labeling kits?
Comparative genome hybridization (CGH) does not require DANN fragmentation prior to analysis and can be performed with genomic input DANN.…
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
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
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