Nonhomologous structures

Convergence of catalytic site in nonhomologous structures. Serine... 

Nonglass pH electrodes, 14 24 Nonhalogenated resin systems, 20 115 Nonhalogenated solvents, 19 800 Nonhazardous waste, defined, 25 862 Nonheterocyclic compounds, pyridine ring syntheses from, 21 108—110 Nonhomologous extension modeling, in protein structure prediction, 20 837-839... 

In step b branch migration takes place, separating the nonhomologous base pairs TA and CG and causing mismatched pairs which will be subject to repair. (B) Proposed three-dimensional structure (after drawing by Bennett and West).292... 

Figure 5-28 (A) Abbreviated reaction sequence for formation of a four-way FfoUiday junction between two homologous DNA duplexes. In step a strands are cut and rejoined with movement of the strands to a roughly antiparallel orientation. The resulting structure is thought to resemble that shown below the four-stranded representation. In step b branch migration takes place, separating the nonhomologous base pairs TA and CG and causing mismatched pairs which will be subject to repair. (B) Proposed three-dimensional structure (after drawing by Bennett and West). ...

Since a variation from these standard angles is found for jS turns in proteins, calculations were also done on structures having different (, i/()2 and (,. Analysis of the structural data on 38 nonhomologous pro-... 

Finally, exon shuffling may be used to perform the nonhomologous swapping events. In this case, the pools of secondary structures would be encoded with exons of a living organism, such as E. coli. There is precedent for such use of exon shuffling, at both the DNA (Fisch et al., 1996) and the RNA (Moran et al., 1999) level. 

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