In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.

Q: Linear motifs are short, evolutionarily plastic components of regulatory proteins and provide low-affinity interaction interfaces. These compact modules play central roles in mediating every aspect of the regulatory functionality of the cell. They are particularly prominent in mediating cell signaling, controlling protein turnover and directing protein localization. Given their importance, our understanding of motifs is surprisingly limited, largely as a result of the difficulty of discovery, both experimentally and computationally. The Eukaryotic Linear Motif (ELM) resource at http:// elm.eu.org provides the biological community with a comprehensive database of known experimentally validated motifs, and an exploratory tool to discover putative linear motifs in user-submitted protein sequences. The current update of the ELM database comprises 1800 annotated motif instances representing 170 distinct functional classes, including approximately 500 novel instances and 24 novel classes. Several older motif class entries have been also revisited, improving annotation and adding novel instances. Furthermore, addition of full-text search capabilities, an enhanced interface and simplified batch download has improved the overall accessibility of the ELM data. The motif discovery portion of the ELM resource has added conservation, and structural attributes have been incorporated to aid users to discriminate biologically relevant motifs from stochastically occurring non-functional instances. Figure 5 . Schema of the ELM resource and data life cycle. Annotated ELM classes, and instances thereof, can be searched by database query. Via sequence search by the motif detection pipeline, annotated ELM classes yield putative instances in query sequences. By adding experimental evidence and references, these putative instances become candidate instances for annotation, and, with further curation, ultimately become fully annotated instances.

A: ELM-the database of eukaryotic linear motifs
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Q: A series of 4-aminoquinoline derivatives were synthesized by the reaction of 4-chloro-7-substituted-quinolines with the corresponding mono/ dialkyl amines. The structures of the synthesized compounds were confirmed by NMR and FAB-MS spectral and elemental analyses. Subsequently, the compounds were examined for their cytotoxic effects on two different human breast tumor cell lines: MCF7 and MDA-MB468. Although all compounds examined were quite effective on both cell lines, the compound N 0 -(7-chloro-quinolin-4-yl)-N,N-dimethyl-ethane-1,2-diamine emerged as the most active compound of the series. It was particularly potent against MDA-MB 468 cells when compared to chloroquine and amodiaquine. The compound butyl-(7-fluoro-quinolin-4-yl)-amine showed more potent effects on MCF-7 cells when compared to chloroquine. Therefore, 4-aminoquinoline can serve as the prototype molecule for further development of a new class of anticancer agents.

A: Synthesis and in vitro cytotoxicity evaluation of 4-aminoquinoline derivatives
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Q: The aim of this study was to evaluate some immunological patterns involved in natural and acquired resistance against MHV3 using the original model of genetically modified lines of mice selected for high (H III ) and low (L III ) antibody responsiveness. As previously shown, a lower pre-existing anti-MHV antibody level was found in susceptible H III mice as compared to resistant L III mice. Mortality rates of the F 1 (H A L) hybrids and F 2 and backcross segregants reflected co-dominance of both characters and the survivors had higher preexisting anti-MHV antibody titers. The present data show that both lines had the potential to synthesize antibodies and that the resistance acquired by the susceptible H III mice paralleled the antibody synthesis. Nevertheless, higher antibody titers were necessary to confer resistance in H III mice than in L III ones. When compared to uvMHV3, a single immunization with a related infectious MHV strain induced a higher antibody synthesis and led the H III mice to resist the MHV3 challenge. A direct correlation between the antibody level and resistance to infection was always observed in H III mice. Although mounting a Th2 response as indicated by IgG1 responses, they were also able to readily synthesize large amounts of IgG2a antibodies after immunization or during infection, reflecting a Th1 response. The transfer of anti-MHV antibodies to susceptible H III mice was capable of conferring resistance to MHV3, providing the antibodies were present before virus infection and in large amounts. The resistance and the survival time of these animals increased with the level of antibody administered. If these direct and clear data suggest that H III mice can acquire resistance through antibodies, the basis of the resistance of the resistant L III mice may rely on mechanisms less dependent on antibodies.

A:
Antibody responsiveness during immunization and challenge of genetically modified antibody responder mice with murine hepatitis virus 3
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