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  CHORI-260 Turkey BAC Library


The CHORI-260 Turkey BAC Library has been constructed by Michael Nefedov in Pieter de Jong’s laboratory at BACPAC Resources, Children’s Hospital Oakland Research Institute. The preparation of the library followed the cloning approach developed in our laboratory (Osoegawa et al., 1998). A blood sample from a female turkey was kindly provided by Dr. David Harry (Nicholas Turkey Breeding Farms, Sonoma, CA). DNA was isolated from whole blood by embedding a mixture of erythrocytes and lymphocytes in agarose. The agarose-embedded high-molecular weight DNA was partially-digested with a combination of EcoRI restriction enzyme and EcoRI Methylase. The DNA fragments were size-fractionated by pulsed field electrophoresis and DNA fragments from the appropriate size fraction were cloned into the pTARBAC2.1 vector between the EcoRI sites. The ligation products were then transformed into DH10B (T1 resistant) electro-competent cells (Invitrogen). The library has been arrayed into 192 [384-well] microtiter dishes. For screening by probe hybridization, four 22x22cm nylon high-density colony filters have been prepared. Each hybridization membrane represents over 18,000 distinct BAC clones from 48 microtiter dishes, represented by duplicate colonies. Library characterization (see below) was performed by Qing Cao, Teresa Ren & Kazutoyo Osoegawa. This work was funded by grant support from the USDA (#99-35205-8537).

Cloning Vector pTARBAC2.1
DNA Source Whole blood
Restriction Enzyme EcoRI
Plate range (1 - 192)
Total 384-well dishes 192
Empty wells 1,500 (<2.1 %)
Non-insert clones 2/182(<1.1%)
Vector clones 0/73k (<<1%)
Recombinant Clones ~ 71,000 (>96% of wells)
Insert Size Average ~ 190 kb
Standard Deviation 44 kb
Library Redundancy ~11.1 fold

Click here for a legend of the previous tables.

Data on the CHORI-260 clone average insert size has been determined by Pulsed Field Gel Electrophoresis. Clone size distribution has been plotted graphically.
Individual clones identified after screening can be obtained as stab cultures at a cost of $80 per clone in addition to a $35 set-up charge per shipment. Shipping will be done by Federal Express and charged to the recipients account number.
With respect to the scheduling of shipments of arrayed library copies, we would like to make you aware of our policy for array distribution.

Please visit the ordering information page if you want to place an order.
Academic and commercial users interested in a copy of the BAC library should contact Pieter J. de Jong (, fax: (510) 450-7924). For hybridization membranes, please contact BACPAC Resources.

Please contact Pieter J. de Jong or Kazutoyo Osoegawa for questions related to this library.


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