30s loop

The chemokine fold (Fig. 1C) consists of a flexible N-terminus, an N-loop, occasionally a 3io helix, an antiparallel three-stranded P-sheet, and a C-terminal a-hehx. Within the antiparallel three-stranded P-sheet, the pi-strand is connected to P2-strand by the 30s loop and p2-strand is... 

Figure 4.7 The dependences of the critical nucleus size / (1-4) and statistical segment length (5, 6) on the tension degree X for LDPE (1-6) and PCP (6). The straight lines 7 and 8 indicate experimental values of for LDPE [46] and PCP [18]. Curves 1-4 1 - nucleus consisting of 30% chains and 70% loops forming 2 - nucleus consisting of 50% chains and loops forming 3 - nucleus consisting of 70% chains and 30% loops forming 4 - shaft-like nucleus [48]...

One glycosylation site exists on the P suburhts of human LH [53664-53-2 and TSH [64365-92-OJ ie, Asn-30 (Fig. 4). In some species, Asn-13 of LH-P is glycosylated (48). FSH-P suburnt [58857-12-8] is glycosylated at two sites, Asn-13 and 30. Based on interactions of synthetic peptides with the LH receptor, loops formed by P93—100 and P38—57 may be essential for hormone bioactivity (48). Highly conserved sequences between residues 31—37 have been implicated in the formation of the a—P suburnt dimer (48), which is absolutely necessary for the expression of bioactivity. 

In the former USSR, there reportedly are two technologies in use one is old anthrahydroquinone autoxidation technology and the other is closed-loop isopropyl alcohol oxidation technology. Production faciUties include several smaller, 100-150-t/yr isopropyl alcohol oxidation plants and a larger, 15,000-t/yr plant, which reportedly is being expanded to 30,000-t/yr. Differences in this technology as compared to the Shell Chemical Co. process are the use of oxygen-enriched air in the oxidation step and, catalytic reduction of the coproduct acetone back to isopropyl alcohol per equation 21. 

Another method for estimating thixotropy involves the hysteresis of the thixotropic loop. The area of the thixotropic loop is calculated or measured, which works well with printing inks (3). In a variation of this method, the up curve on an undisturbed sample is deterrnined. The sample is then sheared at high shear (>2000 ) for 30—60 s, followed by deterrnination of the down curve (22). The data ate plotted as Casson-Asbeck plots, vs 7 / (14), as... 

Figure 10.30 Amino acid sequences of the hellx-loop-helix region of some members of the b/HLH and b/HLH/zlp families of transcription factors. Residues that form the hydrophobic core of the four-helix bundle are colored green and a conserved lysine residue is blue. The loop region between HI and H2 is highly variable in length but must be at least four or five residues long.

---