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Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

What is the difference between a gBlocks™ Gene Fragment and an eBlocks™ Gene Fragment?

Here is a comparison of gBlocks and eBlocks Gene Fragments:

  gBlocks Gene Fragments eBlocks Gene Fragments
Double-stranded DNA
Stringent QC process
• Median error rate
• Synthesis & assembly

May rework to meet QC standards

No rework
Format Plates or tubes  Plate
Length 125–3000 bp  300–900 bp 
Shipping time Fast  Faster 

† Any eBlocks fragment that does not meet QC standards after the first attempt will be cancelled and refunded.


*RUO—For research use only. Not for use in diagnostic procedures. Unless otherwise agreed to in writing, IDT does not intend for these products to be used in clinical applications and does not warrant their fitness or suitability for any clinical diagnostic use. Purchaser is solely responsible for all decisions regarding the use of these products and any associated regulatory or legal obligations.