Configuration, trans compact

Myoglobin is an extremely compact molecule with very little empty space, accommodating only a small number of water molecules within the overall molecular dimensions of 4.5 x 3.5 x 2.5 nm. All of the peptide bonds are planar with the carbonyl and amide groups in trans configurations to each... 

At present, the trend is toward small, compact spec-trofluorometers with all the optical components within a single enclosure. Such instruments are ea to maintain because there Is little opportunity to alter the configuration. However, a modular Instrument has numerous advantages in a research labor ory. For instance, if the xenon lamp and monochromator are removable, a laser source can be used in place of the arc lamp. On some occasions it is desirable to bypass the emission monochronuuor and use bandpass filters to collect as much of the eimssion as possible. Such experiments are only practical if the emission monochromator is removable. If the monochrom or cannot be removed, it is useful to remember that gratings act like mirrors at the zero-order diffraction. If the wavelength is set to zero, the monochromator typically trans-... 

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