Extra arm

The D, T VC, and extra arms help define a specific tRNA. 

If UV-vis. spectra are to be taken, e.g. at the end of the reaction, without exposing the reaction mixture to the atmosphere, an extra arm terminating in a quartz cell can also be added to the assembly. Many such devices can be found in the literature, and three in this book (Fig. 3.25, 3.26, and 5.8) which can be combined with a dilatometer. 

The K Series of Molybdenum.—The authors have also measured the emission and absorption spectra for the K series of molybdenum. The apparatus and method used are described in previous papers.7 A Coolidge tube equipped with a molybdenum target and an extra arm at the end of which happened to be a thin glass window served as the source of radiation. 

This highly variable loop is called the extra arm. 

Previously, several groups had attempted to synthesize regular stars via a linking reaction of living anionic polymers with BnX-based multifunctional terminators. Unfortunately, however, a series of undesirable side reactions was often encountered that resulted in mixtures of fewer-armed or extra-armed stars, in addition to the target star-branched polymers. Such side reactions have been eUminated by using DP E-end-capped living anionic polymers in THE at —40°C (or lower... 

The general t-RNA structure is characterised by four main arms and a minor extra arm which is of variable size (Figure 11.40). Some unusual bases are always present and about half the nucleotides are base-paired. In addition to the anticodon arm there is the DHU arm which contains up to three dihydrouridine residues, and the T j/C arm containing the T /C sequence of bases. The amino... 

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