Complementation analysis with independently isolated plA and adk (adenylate kinase) mutants of Escherichia coli showed that all the mutants belong to the same complementation group. The results suggest that the adk (plsA) locus is the structural gene for adenylate kinase.

Auxotrophic proA mutants of Escherichia coli were complemented by two different classes of Corynebacterium glutamicum genes. One of these was the asd gene. The E. coli asd gene also complements the same proA alleles. Complementation of proA by the asd+ gene requires a high asd dosage and the proB and the proC gene products. The reciprocal complementation pattern (asd by the proA+ gene) was not ...

Fanconi anemia (FA) is an autosomal recessive disease with diverse clinical symptoms, life-threatening progressive panmyelopathy, and cellular hypersensitivity to cross-linking agents. Currently, 4 genetic subtypes or complementation groups (FA-A through FA-D) have been distinguished among 7 unrelated FA patients. We report the use of genetically marked FA lymphoblastoid cell lines representing...

Six leucine auxotrophic strains of the white rot basidiomycete Phanerochaete chrysosporium were characterized genetically and biochemically. Complementation studies involving the use of heterokaryons identified three leucine complementation groups. Since all of the leucine auxotrophs grew on minimal medium supplemented with alpha-ketoisocaproate as well as with leucine, the transaminase catalyz...

We consider the Schur complement operation for symmetric matrices over GF(2), which we identify with graphs through the adjacency matrix representation. It is known that Schur complementation for such a matrix (i.e., for a graph) can be decomposed into a sequence of two types of elementary Schur complement operations: (1) local complementation on a looped vertex followed by deletion of that ver...

Complementation of finite automata on infinite words is not only a fundamental problemin automata theory, but also serves as a cornerstone for solving numerous decision problemsin mathematical logic, model-checking, program analysis and verification. For Streett comple-mentation, a significant gap exists between the current lower bound 2 lgnk) and upper bound2 lg , where n i...

Hepatitis C virus NS5A has three structural domains, is required for RNA replication and virion assembly, and exists in hypo- and hyperphosphorylated forms. Accumulated data suggest that phosphorylation is involved in modulating NS5A functions. We performed a mutational analysis of highly conserved serine residues in the linker region between domains I and II of genotype 2a JFH1 NS5A. As with g...

This work provides a structural characterisation of hereditary graph classes that do not contain star forest, several graphs obtained from forests by subset complementation, union cliques, and the complement cliques as induced subgraphs. provides, for instance, results containing matching complements matching. In terms speed classes, our imply all such have at most factorial growth.