Eight discrete bands, ranging from 100 to 1,000 bases
Higher intensity band at 500 bases for easy reference
No need for staining or destaining as loading dye contains ethidium bromide
Convenient lyophilized format provides better product stability
The Norgen 100 b RNA Ladder is a set of RNA transcripts derived from recombinant DNA templates. This ladder is suitable for precise sizing of small RNA molecules using native or denaturing agarose gels, and can be easily visualized under UV.
To reconstitute the lyophilized RNA ladder, add 250 µL of 1x loading buffer to each 25 loads vial and vortex gently. Heat at 80°C for 10 minutes. Incubate on ice for 1 min. Load 10 µL on a 1.5-2% gel. For optimal results, use Norgen 2x loading buffer with each RNA sample. There is no need for staining and destaining denaturing gels since Norgen’s loading buffer contains ethidium bromide.
Gel images of different ranges of library size selection. Sheared human genomic DNA was used as input.
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Library size selection is an enrichment of a specific range of library sizes for NGS library preparations. The NGS library preparation is related to the quality of the sequencing data. Precise NGS library size selection can increase sequencing efficiency, improve data quality, and reduce costs.
There are two types of sequencing technologies: short-read sequencing and long-read sequencing. Short-read sequencing uses DNA libraries that contain small insert DNA fragments of similar sizes, usually several hundred base pairs. The sequencing efficiency can be improved if the DNA size selection is in the right range. Cat.# 20104S and 20104L are the best kits for NGS library size selection of illumina paired-end 100 (PE100) sequencing with 100-200 bp library inserts; Cat.# 20105S and 20105L are the best kits for NGS library size selection of illumina paired-end 150 (PE150) sequencing with 150-300 bp library inserts; and Cat.# 20106S and 20106L are the best kits for NGS library size selection of illumina paired-end 300 (PE300) sequencing with 300-600 bp library inserts.
Long-read sequencing uses a large DNA fragment as input and makes very long reads. Usually, library size selection is preferred to remove smaller fragments. Cat.# 20110S and 20110L are the best kits for long-read sequencing size selection with DNA sizes >5 kb, and Cat.# 20111S and 20111L are the best kits for long-read sequencing size selection with DNA sizes >10 kb.
The magnetic beads, or SPRI (Solid Phase Reversible Immobilization) beads, is well used for the purification of DNA due to their reversible DNA binding. The NGS library can be size-selected by the magnetic beads or SPRI beads. The properties of the magnetic beads can be changed for a specific range of DNA binding. The contaminants and other unwanted components in the libraries can also be removed during size selection.
Specific ranges of NGS libraries can be selected using magnetic beads with different buffer compositions. The first DNA-beads binding step, also called the right-side clean-up, removes large NGS library fragments. The large NGS library fragments that bind to the beads are discarded with the beads pellet. The desired NGS library fragments in the supernatant are transferred to a new well, and new beads are added to the supernatant for the second beads-DNA binding, also called the left-side clean-up. After the rinsing step, the NGS library fragments with the dual selection are eluted in water or an appropriate buffer. The magnetic beads method has great advantages over time-consuming column purification and tedious gel-based purification.
NGS library size selection with dual clean-ups.
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Library size selection for long-read sequencing only requires a single clean-up. In this case, only the large library fragments are bound to the beads, while other small library fragments are discarded with the supernatant. The selected larger library fragments are eluted in water or an appropriate buffer after the rinsing step.
NGS library size selection with single clean-up for >5 kb and >10 kb libraries.
DBCO-PEG4-alcohol is a PEG linker containing a DBCO moiety and a terminal primary hydroxyl group. The hydroxyl can react with a variety of functional groups and the hydrophilic PEG spacer arm can provide better solubility to labeled molecules. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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DBCO-PEG4-alcohol is a PEG linker containing a DBCO moiety and a terminal primary hydroxyl group. The hydroxyl can react with a variety of functional groups and the hydrophilic PEG spacer arm can provide better solubility to labeled molecules. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
1. Microprocessor control, less noisily, it is widely used to qualitative analysis of blood serum, plasma and urea in the fields of hospital, laboratory and biochemistry.
2. Brushless motor, free maintenance, no powder pollution, quick in speed up and down.
3. Special program, HLA and SERO separately.
5. Micro computer control system, LED display the RCF，time and speed.
6.. Electric lid lock, compact design, super speed and imbalance protection.
TD4 Technical Parameter：
Max. Speed
4000rpm
Max. RCF
2000
Max. Capacity
12×7
Time Range
0~99min
RPM/RCF Convert
Yes
Noise (dB)
≤ 55
Temperature
Normal
Acc/Dcc
10 Kinds
Speed Accuracy
±20r/min
Temperature Accuracy
/
Voltage(V/Hz)
AC 220V/110V 50HZ/60HZ
Size (W x D x Hmm)
485×320×255mm
Net Weight(Kg)
24KG
Matched Rotors for TD4
Order No.
Rotor
Max Speed (rpm)
Max Volume(ml)
Max. RCF（×g）
NO31501
SERO Rotor
3000
12×7/5ml(10-13*60-100mm)
2000
NO31502
HLA Rotor
4000
12×2/1.5/0.5ml
1000
Rotor Name
Max RCF(×g)
Use
HLA rotor for Lymphocyte washing
2000
Lymphocyte separation incubated cell separation
1000
Hematoblast extenterate(thrombin disposal)
1000
Lymphocyte washing
SERO rotor for erythrocyte washing
500
Blood type determination, the image of the hematocyte
1000
The test of intersectant aptness
1000
Hematocyte washing, the distillation of the serum and plasma
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TD4 cell washer centrifuge it is widely used to qualitative analysis of blood serum, plasma and urea in the fields of hospital, laboratory and biochemistry.
Matched Rotors for TD4