7. Molecular interactions
... A hydrogen bond is an attractive interaction between two species that arises from a link of the form A–H · · B , where A and B are highly electronegative elements and B possesses a lone pair of electrons. It is conventionally regarded as being limited to N, O, and F, but if B is an ionic species (su ...
... A hydrogen bond is an attractive interaction between two species that arises from a link of the form A–H · · B , where A and B are highly electronegative elements and B possesses a lone pair of electrons. It is conventionally regarded as being limited to N, O, and F, but if B is an ionic species (su ...
Solving Protein Structures
... pared to obtain the positions of the heavy atoms. From these positions, the initial phases can be calculated. Single or multiple wavelength anomalous dispersion (SAD or MAD) take advantage of the anomalous scattering of the protein atoms, such as selenium inserted through the use of selenomethionine ...
... pared to obtain the positions of the heavy atoms. From these positions, the initial phases can be calculated. Single or multiple wavelength anomalous dispersion (SAD or MAD) take advantage of the anomalous scattering of the protein atoms, such as selenium inserted through the use of selenomethionine ...
Spectral-Type Trends: Absorption
... the Chandra archive, arranged in order of decreasing surface temperature and mass-loss rate. As is evident from the data, the more luminous stars have stronger emission at short wavelengths. One possible explanation for this trend is that we are seeing the effects of absorption on the spectra. Since ...
... the Chandra archive, arranged in order of decreasing surface temperature and mass-loss rate. As is evident from the data, the more luminous stars have stronger emission at short wavelengths. One possible explanation for this trend is that we are seeing the effects of absorption on the spectra. Since ...
Homework #2 Solutions Version 2
... 5. In the figure, a small, nonconducting ball of mass m = 1.0 mg (note the units) and charge q = 2.0 × 10−8 C (distributed uniformly through its volume) hangs from an insulating thread that makes an angle θ = 30◦ with a vertical sheet which has a uniform charge density σ (shown in cross section); su ...
... 5. In the figure, a small, nonconducting ball of mass m = 1.0 mg (note the units) and charge q = 2.0 × 10−8 C (distributed uniformly through its volume) hangs from an insulating thread that makes an angle θ = 30◦ with a vertical sheet which has a uniform charge density σ (shown in cross section); su ...
Combinatorial Chemistry and Drug Discovery
... theoretically generate an α or a β linkage to any one of several positions on another monosaccharide in a chain or to another type of molecule. Thus, it has been pointed out that although three nucleotide bases or amino acids can only generate six variations, three hexoses could produce (depending o ...
... theoretically generate an α or a β linkage to any one of several positions on another monosaccharide in a chain or to another type of molecule. Thus, it has been pointed out that although three nucleotide bases or amino acids can only generate six variations, three hexoses could produce (depending o ...
Another way ……
... biophysical studies suggest that the b2AR and many other GPCRs exist as dimers or higher-order oligomers（寡聚物） in the plasma membrane of cultured cells, and there may be a role for dimers in the export of properly folded receptor protein from the endoplasmic reticulum（ER）. It is important to note, ho ...
... biophysical studies suggest that the b2AR and many other GPCRs exist as dimers or higher-order oligomers（寡聚物） in the plasma membrane of cultured cells, and there may be a role for dimers in the export of properly folded receptor protein from the endoplasmic reticulum（ER）. It is important to note, ho ...
primary structure
... covalently attached chemical group called a ligand that is bound by the protein of interest (Fig. 3-17c). Thus when a mixture of proteins containing the protein that recognizes the ligand is applied to the column, other proteins pass through in a wash of the column, while the protein of interest is ...
... covalently attached chemical group called a ligand that is bound by the protein of interest (Fig. 3-17c). Thus when a mixture of proteins containing the protein that recognizes the ligand is applied to the column, other proteins pass through in a wash of the column, while the protein of interest is ...
electric field magnetic field
... • are in the frequency range of a few billion Hz or wavelengths of about several cm (about the same range as radar the “Radarange” • How do microwaves heat water? • Remember that the water molecule has a positive end and a negative end. • The electric field of the microwave grabs onto these charge ...
... • are in the frequency range of a few billion Hz or wavelengths of about several cm (about the same range as radar the “Radarange” • How do microwaves heat water? • Remember that the water molecule has a positive end and a negative end. • The electric field of the microwave grabs onto these charge ...
Polarization of Light and Rotation of the Polarization
... Equations and the fact that the electric field is a vector. Linearity implies that we can add or decompose into components the amplitudes of light waves just as for any vectors. If we figure out what happens to the electric field of the light wave, the magnetic field will do what ever is required to ...
... Equations and the fact that the electric field is a vector. Linearity implies that we can add or decompose into components the amplitudes of light waves just as for any vectors. If we figure out what happens to the electric field of the light wave, the magnetic field will do what ever is required to ...
Lecture 4b - UCLA Chemistry and Biochemistry
... (GC/MS) to separate the compounds before they enter the mass spectrometer. • They only require very small amounts of sample (~1 ng). • The mass spectrometer employs an ultrahigh vacuum (<10-6 torr). • Since there is only one detector, the magnetic field has to be scanned during the acquisition in or ...
... (GC/MS) to separate the compounds before they enter the mass spectrometer. • They only require very small amounts of sample (~1 ng). • The mass spectrometer employs an ultrahigh vacuum (<10-6 torr). • Since there is only one detector, the magnetic field has to be scanned during the acquisition in or ...
science 106
... (11) (3 pts) Which of the following is correct about magnets/magnetic field lines? (a) It is possible to separate the north and south poles of a magnet by cutting it into smaller pieces. (b) Magnetic field lines point from positive to negative electric charges. (c) Magnetic field lines point along t ...
... (11) (3 pts) Which of the following is correct about magnets/magnetic field lines? (a) It is possible to separate the north and south poles of a magnet by cutting it into smaller pieces. (b) Magnetic field lines point from positive to negative electric charges. (c) Magnetic field lines point along t ...
electric field magnetic field
... • are in the frequency range of a few billion Hz or wavelengths of about several cm (about the same range as radar the “Radarange” • How do microwaves heat water? • Remember that the water molecule has a positive end and a negative end. • The electric field of the microwave grabs onto these charge ...
... • are in the frequency range of a few billion Hz or wavelengths of about several cm (about the same range as radar the “Radarange” • How do microwaves heat water? • Remember that the water molecule has a positive end and a negative end. • The electric field of the microwave grabs onto these charge ...
Ch4Carbonand5Macromolecules
... Nature of science: Looking for patterns, trends and discrepancies— most but not all organisms assemble proteins from the same amino acids (3.1). Understandings: • Amino acids are linked together by condensation to form polypeptides. • There are 20 different amino acids in polypeptides synthesized on ...
... Nature of science: Looking for patterns, trends and discrepancies— most but not all organisms assemble proteins from the same amino acids (3.1). Understandings: • Amino acids are linked together by condensation to form polypeptides. • There are 20 different amino acids in polypeptides synthesized on ...
Protein Requirements for Good Nutrition
... This is where the hard part comes in. You now have two choices. The first is to buy a reputable quality brand of dog food for the activity level of your dog and hope that its needs are being met. This is what most owners do and the average dog does just fine. But if you have a dog with special prote ...
... This is where the hard part comes in. You now have two choices. The first is to buy a reputable quality brand of dog food for the activity level of your dog and hope that its needs are being met. This is what most owners do and the average dog does just fine. But if you have a dog with special prote ...
Circular dichroism
Circular dichroism (CD) is dichroism involving circularly polarized light, i.e., the differential absorption of left- and right-handed light. Left-hand circular (LHC) and right-hand circular (RHC) polarized light represent two possible spin angular momentum states for a photon, and so circular dichroism is also referred to as dichroism for spin angular momentum. This phenomenon was discovered by Jean-Baptiste Biot, Augustin Fresnel, and Aimé Cotton in the first half of the 19th century. It is exhibited in the absorption bands of optically active chiral molecules. CD spectroscopy has a wide range of applications in many different fields. Most notably, UV CD is used to investigate the secondary structure of proteins. UV/Vis CD is used to investigate charge-transfer transitions. Near-infrared CD is used to investigate geometric and electronic structure by probing metal d→d transitions. Vibrational circular dichroism, which uses light from the infrared energy region, is used for structural studies of small organic molecules, and most recently proteins and DNA.