CD Formulation offers precise optical rotation analysis to deepen researchers' insights into the molecular symmetry and chirality of nucleic acid drugs. Our service is crucial for comprehending drug characteristics, reaction mechanisms, and optimizing applications. We utilize advanced lab equipment and a skilled technical team to guarantee accurate and reliable results.
Optical rotation measures a substance's ability to rotate plane-polarized light due to its chiral molecules, which have specific spatial directionality. In nucleic acids, chirality mainly arises from amino acid residues. This testing identifies and characterizes nucleic acid drug structures and monitors quality at various stages, from synthesis to formulation. Typically, a polarimeter measures this property, with its data compared against references to understand the sample's optical rotation characteristics.
By measuring the specific rotation values, the purity and characteristics of nucleic acid drugs can be identified. This optical measurement method can help differentiate between various nucleic acid compounds or assess the purity of a material.
When optical isomers are present in nucleic acid drugs, their optical rotation properties may differ. Measuring optical rotation can identify and quantify the presence of impurities, supporting the purity testing of nucleic acid drugs.
For nucleic acid drugs with optical activity, optical rotation measurement provides a crucial tool for chirality analysis. This method helps in understanding the stereochemical configuration of molecules and their behavior in different environments.
For chiral drugs, determining their optical rotation is an essential means of ensuring drug safety. Different chiralities have varied effects on a drug's pharmacology, toxicology, and pharmacokinetics, thus requiring the monitoring and assessment of optical rotation.
Testing the optical rotation of nucleic acid drugs usually involves using a polarimeter, an instrument for measuring a compound's optical rotation properties. Initially, prepare a high-purity sample of the nucleic acid drug, ensuring its concentration is suitable for measurement and dissolved in a transparent and appropriate solvent. Conditions during sample preparation, including concentration and temperature, should be strictly controlled to ensure reliable data. Then, calibrate the polarimeter to ensure accuracy, using standard substances for calibration. Place the sample in the measurement cell of the polarimeter, ensuring a consistent pathway length for each measurement to record the sample's rotation angle.
Upon completing the measurement, the obtained optical rotation data needs further analysis. Specific rotation is calculated using known formulas, a critical indicator of purity and structural characteristics for identifying nucleic acid drugs and serving as an essential quality control metric. Additionally, if the drug contains different optical isomers, optical rotation data can determine the isomer proportions. When analyzing data, consider factors affecting the measurement process, such as temperature fluctuations, to ensure accurate and reliable results.
Fig.1 Flow chart of nucleic acid drug optical rotation analysis. (CD Formulation)
First, dissolve the nucleic acid drug in an appropriate solvent, ensuring complete solubility and uniformity of the sample. The concentration should fit within the detection range of the polarimeter to ensure measurement accuracy.
Before measuring samples, use standard solutions to calibrate the polarimeter, ensuring the device operates optimally. This typically involves adjusting the instrument's light source and detector to achieve desired sensitivity.
Place the prepared nucleic acid drug sample in the polarimeter's sample cell. Ensure no bubbles are present in the cell before starting the measurement to avoid influencing the result. Record the reading displayed by the polarimeter, considering the effect of ambient temperature on the results.
Using the measured optical rotation values, together with sample concentration, solvent properties, and measurement wavelength, calculate the specific rotation. This data evaluates the optical activity and purity of nucleic acid drugs.
Items | Descriptions |
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Polarimeter Platform | This platform specializes in measuring the optical rotation of substances. It can accurately measure the rotation angle of a sample with polarized light, aiding researchers in understanding a sample's optical activity. |
HPLC Platform | When combined with optical rotation detection, HPLC can simultaneously separate sample components and measure optical rotation, providing detailed information on purity and composition. |
Technology: DNA testing utilizing the optical rotation detection technology platform
Journal: Scientific Reports
IF: 3.93
Published: 2019
Results:
The study introduces a novel, non-destructive, label-free optical rotation system for analyzing DNA strand states using weak measurements. Unlike traditional methods, this approach modulates the preselected polarization impacted by DNA's single- or double-stranded configurations. The resulting optical rotation is identified through the spectral wavelength shift. Real-time monitoring was utilized to investigate DNA strand separation with varied base proportions (25% and 70%), lengths (4nt and 40nt), and the presence of cholesterol modifications across different pH and temperature conditions. This method boasts a DNA concentration detection limit of 5 × 10^-6 mol/L, offering simplicity and real-time, efficient analysis.
Fig.2 Optical rotation changes. (Guan T, et al., 2019)
If you require more information regarding optical rotation measurements for nucleic acid drugs, please feel free to contact our expert team. We are committed to providing top-notch consultation and technical support to ensure your research progresses smoothly.
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