IPTG (isopropylthio-β-galactoside) is an inducer of β-galactosidase activity in bacteria and is suitable for use with X-gal or bluo-gal to detect lac gene activity in cloning procedures. How it works IPTG binds to the lac repressor and releases lac repressor from the lac operator, thereby allowing the transcription of genes in the lac operon, such as the gene coding for β-galactosidase. Shipping: room temperarture Storage: -20°C Safety Data Sheet MSDS

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≥99.5% IPA CAS No: 67-63-0 Formula: C3H8O or CH3CHOHCH3 or (CH3)2CHOH Molecular Weight: 60.10 Density: 0.785g/mL at 25°C Storage temperature: 5 to 30°C Boiling point: 82°C Melting point: -89.5°C Flash point: 12°C Meets ACS specifications Manufactured in ISO9001 certified facilities  Packaged under nitrogen 0.2um filtered Container material: HDPE Container neck thread: 70mm Safety Data Sheet MSDS

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≥99.5% IPA CAS No: 67-63-0 Formula: C3H8O or CH3CHOHCH3 or (CH3)2CHOH Molecular Weight: 60.10 Density: 0.785g/mL at 25°C Storage temperature: 5 to 30°C Boiling point: 82°C Melting point: -89.5°C Flash point: 12°C Meets ACS specifications Manufactured in ISO9001 certified facilities  Packaged under nitrogen 0.2um filtered Container material: HDPE Container neck thread: 70mm Safety Data Sheet MSDS

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≥99.5% IPA CAS No: 67-63-0 Formula: C3H8O or CH3CHOHCH3 or (CH3)2CHOH Molecular Weight: 60.10 Density: 0.785g/mL at 25°C Storage temperature: 5 to 30°C Boiling point: 82°C Melting point: -89.5°C Flash point: 12°C Meets ACS specifications Manufactured in ISO9001 certified facilities  Packaged under nitrogen 0.2um filtered Container material: HDPE Container neck thread: 70mm Safety Data Sheet MSDS

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DNA Pol I Large fragment (Klenow) was originally derived as a proteolytic product of E. coli DNA polymerase. It retains polymerase activity, but lacks both 5’ —> 3’ and 3' —> 5’ exonuclease activity. Generates probes using random primers Dideoxy sequencing Random priming labeling Moderate strand displacement activity Not suitable for generating blunt ends Product Notes Klenow Fragment (3´→ 5´ exo-) is not suitable for generating blunt ends because it lacks the 3´→ 5´ exonuclease necessary to remove non-templated 3´ additions. When Klenow Fragment (3´→ 5´ exo-) is used to sequence DNA using the dideoxy method of Sanger et al., 1 unit/5 µl reaction volume is recommended.

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DNA Polymerase I Large (Klenow) Fragment is the large fragment of E. coli DNA Polymerase I. The Klenow Fragment retains the DNA-dependent DNA polymerase activity of the E. coli DNA Polymerase I but lacks the 5’→3’ exonuclease activity. With its inherent 3’→5’ exonuclease activity, Klenow possesses the polymerization fidelity of the holoenzyme without degrading 5'-termini. Applications: DNA blunting by filling-in 5'-overhangs with unlabeled or labeled dNTPs cDNA second-strand synthesis Generate single-stranded DNA probes using random primers Site-directed DNA mutagenesis using synthetic oligonucleotides Dideoxy DNA sequencing of single- or double-stranded DNA templates 3’→5’ exonuclease activity can blunt a 3’-overhang Concentration: 5 U/μl Storage: Store all components at -20°C. Storage Buffer: 25 mM Tris-HCl (pH 7.5), 0.1 mM EDTA, 1 mM DTT, and 50% (v/v) Glycerol. Note: One unit is defined as the amount of DNA Polymerase I Large (Klenow) Fragment that catalyzes the incorporation of 10 nmol of dNTP into acid insoluble material in 30 minutes at 37°C using poly(dA-dT):poly(dA-dT) as a template:primer. This product is distributed for laboratory research only. Caution: Not for diagnostic use.

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This KN95 protective mask effectively filters non-oily particles to serve as a barrier to potential air pollutants that can be harmful. The face mask’s filtration efficiency of 5 layers will help block out PM2.5 air pollutants like allergens, virus, bacteria, dust, droplets and other harmful non-oil based particles in the air, at least up to 95 percent. It also features an adjustable nose wire to provide proper and comfortable fit to the face contour. 1 pack consists of 10 counts of KN95. Consists Five Layers of: Non-Woven Fabric Hot Air Filter Cotton Meltblown Cloth Meltblown Cloth Non-Woven Fabric Specifications: Bacteria filtration efficiency (BFE) ≥ 95% Particle filtration efficiency (PRE)  ≥ 95% Package: 20/box, 1 boxes Note: Not for medical use.

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This KN95 protective mask effectively filters non-oily particles to serve as a barrier to potential air pollutants that can be harmful. The face mask’s filtration efficiency of 5 layers will help block out PM2.5 air pollutants like allergens, virus, bacteria, dust, droplets and other harmful non-oil based particles in the air, at least up to 95 percent. It also features an adjustable nose wire to provide proper and comfortable fit to the face contour. 1 pack consists of 10 counts of KN95. Consists Five Layers of: Non-Woven Fabric Hot Air Filter Cotton Meltblown Cloth Meltblown Cloth Non-Woven Fabric Specifications: Bacteria filtration efficiency (BFE) ≥ 95% Particle filtration efficiency (PRE)  ≥ 95% Package: 20/box, 25 boxes Note: Not for medical use.

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This KN95 protective mask effectively filters non-oily particles to serve as a barrier to potential air pollutants that can be harmful. The face mask’s filtration efficiency of 5 layers will help block out PM2.5 air pollutants like allergens, virus, bacteria, dust, droplets and other harmful non-oil based particles in the air, at least up to 95 percent. It also features an adjustable nose wire to provide proper and comfortable fit to the face contour. 1 pack consists of 10 counts of KN95. Consists Five Layers of: Non-Woven Fabric Hot Air Filter Cotton Meltblown Cloth Meltblown Cloth Non-Woven Fabric Specifications: Bacteria filtration efficiency (BFE) ≥ 95% Particle filtration efficiency (PRE)  ≥ 95% Package: 20/box, 5 boxes Note: Not for medical use.

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This Digital Lab Countdown Timer features the clear and easy-to-read LCD screen, the bold face numerals with the large display make you can easily read the countdown timer. You can freely set the countdown timer, and the loud and clear but not deafening sound will remind you to deal with your experiment timely.  The moderate sound can be heard from another room, and last for a while. The Countdown Alarm is extremely simple to use with the intuitive button, it counts down from any time up to 99 minutes and 59 seconds. The unit (minute or second) can be switched by pressing the button, it can also act as a stopwatch counting up from zero. Main Features:  Clear and easy-to-read LCD screen Big, bold digits, ideal and convenient for you to read the numbers Loud alarm sound. You are able to hear the timer in another room. Easy to use Counts down from any time up to 99 minutes and 59 seconds. It can also be used as a stopwatch counting up from zero Built-in table stand and magnet, can be used on desktop or attached to the fridge door  Specification: Powered by 1 x AAA battery ( not included ) Product weight: about 33 g Package weight: about 46 g Product size (L x W x H): about 5.30 x 5.70 x 1.40 cm / 2.09 x 2.24 x 0.55 inches Package size (L x W x H): about 6.80 x 2.70 x 6.70 cm / 2.68 x 1.06 x 2.64 inches

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This Digital Lab Countdown Timer features the clear and easy-to-read LCD screen, the bold face numerals with the large display make you can easily read the countdown timer. You can freely set the countdown timer, and the loud and clear but not deafening sound will remind you to deal with your experiment timely.  The moderate sound can be heard from another room, and last for a while. The Countdown Alarm is extremely simple to use with the intuitive button, it counts down from any time up to 99 minutes and 59 seconds. The unit ( minute or second ) can be switched by pressing the button, it can also act as a stopwatch counting up from zero. Main Features:  Clear and easy-to-read LCD screen Big, bold digits, ideal and convenient for you to read the numbers Loud alarm sound. You are able to hear the timer in another room. Easy to use Counts down from any time up to 99 minutes and 59 seconds. It can also be used as a stopwatch counting up from zero Built-in table stand and magnet, can be used on desktop or attached to the fridge door  Specification:  Powered by 1 x AAA battery ( not included ) Product weight: about 33 gProduct size (L x W x H): about 5.30 x 5.70 x 1.40 cm / 2.09 x 2.24 x 0.55 inches

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(On-line chlorinated / Polymer-bonded / Double chlorination) Functional Benefits: Protection from unwanted and dangerous substance. Easy donning and helps prevent roll back. Softness provides superior comfort and natural fit. Beaded cuff makes donning easy. Powder free to eliminate powder-induced irritation and dermatitis to the users. Textured surface on palm and fingers provide a better grip. Low level of extractable proteins and chemical residue, hence lower incidences of allergic reactions. Quality Standards: Conforms to ASTM D3578 (05) and EN455 (part 1, part 2, and part 3) Standards. Manufactured under QSR (GMP) and ISO9001: 2000 Quality Management System. Package: X-Small, Small, Medium and Large: 100/box, 10 boxes/case X-Large: 90/box, 10 boxes/case

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