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1 mm gap cuvette

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The 1 mm gap cuvette is a laboratory equipment designed to hold small sample volumes for optical measurements. It features a 1 mm path length, which allows for accurate absorbance or fluorescence readings of samples with limited volume. This cuvette is suitable for use in spectrophotometers and other analytical instruments that require precise optical measurements.

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8 protocols using 1 mm gap cuvette

1

Bacterial Transformation via Electroporation

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Example 3

1.5-2 μl of ligation mixture was transformed into 20 μl of ElectroMax DH10B T1 Phage-Resistant Competent Cells (Invitrogen, Cat #12033-015) by electroporation using MICROPULSER™ (BioRad) set at 1.7 kV using a 1 mm gap cuvette (BioRad, Cat #165-2089); after a pulse 1 ml SOC was added to cells and cells were incubated at 37° C. for 1 h with shaking at 200 rpm. 10 μl of recovery mixture was plated on LB agar plates containing ampicillin at a concentration of 100 μg/ml. Plates were incubated overnight at 37° C.

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2

Generation of Zeb2 Enhancer Knockout Mice

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Enhancer deletion mice were generated as described (Durai et al., 2019 (link)). sgRNAs flanking the - 165-kb Zeb2 enhancer were identified using CHOPCHOP (http://chopchop.cbu.uib.no/), and the following sgRNA sequences were used: Zeb2 −165 5’: GAGTGAGAGATCATCAAATG and Zeb2 +165 3’: GATAACGTTCTTGAAGCATA. sgRNA with the desired sequences were synthesized and conjugated with purified Cas9 protein to form the RNP complex by the Department of Pathology Micro-Injection Core at Washington University in St Louis. Day 0.5 single cell zygotes from C57Bl/6 mice were isolated and underwent electroporation at the Department of Pathology Micro-Injection Core at Washington University in St Louis. Around 60 single cell zygotes were electroporated with 8μM of RNP complex using 1mm gap cuvette (BioRad). Electroporated zygotes were then transferred into the oviducts of pseudopregnant recipient mice.
The resulting pups were screened by PCR with the following primers to identify those that had successful deletion of the enhancers of interest: 165mutant-Screening-5’: CTGCAGCAGGTTGACAAAGA; 165mutant-Screening-3’: CCTGAAGTGTACGCTCACCA. Mice with the desired deletion were then outcrossed to wildtype (WT) C57BL6/J mice, and the resulting heterozygous mice were intercrossed to generate homozygous enhancer deletion mice.
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3

Bacterial Transformation via Electroporation

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Example 3

1.5-2 μl of ligation mixture was transformed into 20 μl of ElectroMax DH10B T1 Phage-Resistant Competent Cells (Invitrogen, Cat #12033-015) by electroporation using MicroPulser (BioRad) set at 1.7 kV using a 1 mm gap cuvette (BioRad, Cat #165-2089); after a pulse 1 ml SOC was added to cells and cells were incubated at 37° C. for 1 h with shaking at 200 rpm. 10 μl of recovery mixture was plated on LB agar plates containing ampicillin at a concentration of 100 μg/ml. Plates were incubated overnight at 37° C.

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4

Bacterial Transformation via Electroporation

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Example 3

1.5-2 μl of ligation mixture was transformed into 20 μl of ElectroMax DH10B T1 Phage-Resistant Competent Cells (Invitrogen, Cat #12033-015) by electroporation using MicroPulser (BioRad) set at 1.7 kV using a 1 mm gap cuvette (BioRad, Cat #165-2089); after a pulse 1 ml SOC was added to cells and cells were incubated at 37° C. for 1 h with shaking at 200 rpm. 10 μl of recovery mixture was plated on LB agar plates containing ampicillin at a concentration of 100 μg/ml. Plates were incubated overnight at 37° C.

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5

Bacterial Transformation via Electroporation

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Example 3

1.5-2 μl of ligation mixture was transformed into 20 μl of ElectroMax DH10B T1 Phage-Resistant Competent Cells (Invitrogen, Cat #12033-015) by electroporation using MICROPULSER™ (BioRad) set at 1.7 kV using a 1 mm gap cuvette (BioRad, Cat #165-2089); after a pulse 1 ml SOC was added to cells and cells were incubated at 37° C. for 1 h with shaking at 200 rpm. 10 μl of recovery mixture was plated on LB agar plates containing ampicillin at a concentration of 100 μg/ml. Plates were incubated overnight at 37° C.

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6

Generation of Gm39266 Mutant Mice

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Gm39266 mutant mice were generated as illustrated in Figures 3A and 4, A and D. gRNA 1 (CAGGCACAGTCTGGGTACAC), gRNA 2 (GGTAAGAAATCCTACCTCTG), and gRNA 3 (AGGTTCCATGTCCAGCACAT) were identified using Benchling (https://www.benchling.com/crispr). The ssODN donor sequence used in generating Gm39266 3× polyA knock-in (pA/pA) mice is shown in Supplemental Figure S2D. gRNAs with the desired sequence were ordered from IDT and were conjugated with purified Cas9 protein to form the RNP complex by the Genetic Editing and iPS Cell (GEiC) Center at Washington University in St. Louis. Day 0.5 single-cell zygotes were isolated, and CRISPR reagents were introduced via electroporation by the Department of Pathology/Immunology Transgenic Mouse Core at Washington University in St. Louis. Around 60 single-cell zygotes were electroporated with 8 μM RNP complex using a 1-mm gap cuvette (Bio-Rad). Electroporated zygotes were then transferred into the oviducts of day 0.5 pseudopregnant recipient mice.
The resulting pups were screened by PCR using the primers shown in Supplemental Figure S2, A–C, followed by Sanger sequencing to identify those that had successful deletions or insertions of interest. Mice with the desired mutation were then outcrossed to WT C57BL/6J mice, and the resulting heterozygous mice were intercrossed to generate homozygous Gm39266 mutant mice.
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7

Bacterial Cultivation and Transformation

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EcNR2 18 , EcHB3 (Supplementary Table S6), C2566 (New England BioLabs, USA), and their derivatives were grown at 30°C (37°C for C2566) in Luria-Bertani (LB) broth (or agar) supplemented with appropriate antibiotics: ampicillin, 50 μg/ml; kanamycin, 30 μg/ml; or spectinomycin, 100 μg/ml.
IPTG was added to a final concentration of 1 mM. Electroporation was performed as follows: cells were grown until reaching an OD 600 of 0.7. Next, cells equivalent to 1 ml of culture medium were washed twice with 1 ml of ddH2O and resuspended in 50 μl of the appropriate product. The cells were then pulsed with 1.8 kV in a 1-mm-gap cuvette (Bio-Rad, USA).
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8

Bacterial Cultivation and Transformation

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EcNR2 18 , EcHB3 (Supplementary Table S6), C2566 (New England BioLabs, USA), and their derivatives were grown at 30°C (37°C for C2566) in Luria-Bertani (LB) broth (or agar) supplemented with appropriate antibiotics: ampicillin, 50 μg/ml; kanamycin, 30 μg/ml; or spectinomycin, 100 μg/ml.
IPTG was added to a final concentration of 1 mM. Electroporation was performed as follows: cells were grown until reaching an OD 600 of 0.7. Next, cells equivalent to 1 ml of culture medium were washed twice with 1 ml of ddH2O and resuspended in 50 μl of the appropriate product. The cells were then pulsed with 1.8 kV in a 1-mm-gap cuvette (Bio-Rad, USA).
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