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Minimal cooperation as a way to achieve the efficiency in cell-like membrane systems
2019
Journal of Membrane Computing
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rules; and (b) cell-like P systems with symport/antiport rules of minimal length. ...
In this paper, two types of such membrane systems will be considered: (a) polarizationless P systems with active membranes without dissolution rules when minimal cooperation is permitted in object evolution ...
P systems with active membranes. ...
doi:10.1007/s41965-018-00004-9
dblp:journals/jmemcom/Orellana-Martin19a
fatcat:pl4gx2e7k5bxzjugg7s2gz3ude
Membrane fission versus cell division: When membrane proliferation is not enough
2015
Theoretical Computer Science
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Inspired by these biological phenomena, new kinds of models were considered in the discipline of Membrane Computing, in the context of P systems with active membranes, and tissue P systems that use symport ...
This paper combines the two approaches: cell-like P systems with symport/antiport rules and membrane separation are studied, from a computational complexity perspective. ...
In that paper, the definition of tissue P systems with symport/antiport rules is combined with the one of P systems with active membranes, yielding tissue P systems with cell division. ...
doi:10.1016/j.tcs.2015.06.025
fatcat:xmgsjuzfx5el7ddos5vpwbjn5q
New Choice for Small Universal Devices: Symport/Antiport P Systems
2009
Electronic Proceedings in Theoretical Computer Science
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2009 pre-print arXiv:0906.3231v1 fatcat:cgmlmof2cvasjh3ohgvdkghdoy
Symport/antiport P systems provide a very simple machinery inspired by corresponding operations in the living cell. ...
It turns out that systems of small descriptional complexity are needed to achieve the universality by these systems. ...
Hence, deterministic P systems with minimal symport and antiport rules with any number of membranes can generate only finite languages. ...
doi:10.4204/eptcs.1.23
fatcat:gpjwggiw7vhgxaqv6es5mgh4wy
Relationship between the Na+/H+ antiporter and Na+/substrate symport in Bacillus alcalophilus
1981
Proceedings of the National Academy of Sciences of the United States of America
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Thus, nonalkalophilic mutant strains do not exhibit Na+/H+ antiport activity and, interestingly, such strains concomitantly lose the ability to catalyze Na+-dependent accumulation of a-aminoisobutyrate ...
Commun. 91, 58-62]. ...
Although many bacterial transport systems catalyze the coupled movement of protons with substrate (i.e., H+/substrate symport), a substantial number catalyze Na+/substrate symport in analogy with eukaryotic ...
doi:10.1073/pnas.78.3.1481
pmid:6262805
pmcid:PMC319154
fatcat:zrnkfeja6jch3jkztojmzsnqwa
Page 1053 of The Plant Journal Vol. 10, Issue 6
[page]
1996
The Plant Journal
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Tanner, W. (1969) Light-driven active uptake of 3-O-methyiglucose via an inducible hexose uptake system of Chiorella. Biochem Biophys. Res. Commun. 36, 278-386. ...
-L. and Kaback, H.R. (1980) Active transport in membrane vesicles from Escherichia coli. ...
Implementing Bead-Sort with P Systems
[chapter]
2002
Lecture Notes in Computer Science
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Beads are represented by objects placed within membranes of a tissue P system; a rod is represented by a 'group' of membranes that can communicate with one another by means of symport/antiport rules. ...
This natural sorting phenomenon is "implemented" with a special type of P system -a tissue P system that computes by means of communication (using symport/antiport rules) only. ...
Beads are represented by objects x placed within the membranes; a rod is represented by a 'group' of membranes that can communicate with one another by means of symport/antiport rules. ...
doi:10.1007/3-540-45833-6_10
fatcat:necsm36sbfhklljap6kkex6fcy
P Systems with Evolutional Communication and Division Rules
2021
Axioms
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This result is comparable to the one obtained in the tissue-like counterpart, and gives a glance of a parallelism and the non-evolutionary membrane systems with symport/antiport rules. ...
In this work, a solution to the SAT problem, a well-known NP-complete problem, is obtained by means of a family of recognizer P systems with evolutional symport/antiport rules of length at most (2,1) and ...
It is important to take into account that this is a great difference with P systems with active membranes, since in these systems, communication rules between membranes are limited to one object per membrane ...
doi:10.3390/axioms10040327
fatcat:y4g4pp7clzahxbi5pjqvcyku4y
Allosteric regulation of the glucose:H+ symporter of Lactobacillus brevis: cooperative binding of glucose and HPr(ser-P)
1995
Journal of Bacteriology
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HPr, the small phosphocarrier protein of the phosphotransferase system. ...
Lactobacillus brevis transports glucose and the nonmetabolizable glucose analog 2-deoxyglucose via a proton symport mechanism that is allosterically inhibited by the seryl-phosphorylated derivative of ...
Erickson for assistance with the iodination of S46DHPr, as well as X. Cui and J. Reizer for providing the HPr and the mutant HPr derivatives used in this study. ...
doi:10.1128/jb.177.7.1900-1902.1995
pmid:7896720
pmcid:PMC176825
fatcat:2c6qetqtmzhtrmhuzvuui4ugkq
Proton-Coupled Sucrose Transport in Plasmalemma Vesicles Isolated from Sugar Beet (Beta vulgaris L. cv Great Western) Leaves
1989
Plant Physiology
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In the experiments reported here, an active, proton-coupled sucrose transport system has been idenfffied and partially characterized in plasmalemma vesicles Isolated from mature sugar beet (Beta vulgarls ...
ApH-dependent sucrose transport exhibited saturation kinetics with an apparent K. of 1.20 ± 0.40 millimolar, suggesting translocation was carrier-mediated. ...
This communication focuses on an active sucrose transport system associated with mature photosynthetic leaves, which may be involved with sucrose flux into the vascular system of the plant. ...
doi:10.1104/pp.89.4.1318
pmid:16666703
pmcid:PMC1056015
fatcat:xpsh2ipexbcnxakbwgeu75qqbi
Counting Time in Computing with Cells
[chapter]
2006
Lecture Notes in Computer Science
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In the first part of the paper, we introduce and study the properties of "timed symport/antiport systems". ...
In the second part we introduce several new features for P systems: the association/deassociation of molecules (modeling for example the protein-protein interactions), ion channel rules and gene activation ...
Acknowledgements We would like to mention the fruitful discussions with B. Tȃnasȃ (MIT) and the insightful suggestions received from the anonymous referees. O. H. ...
doi:10.1007/11753681_9
fatcat:zyiagiunjrbsrbae56gua4332i
P systems attacking hard problems beyond NP: a survey
2019
Journal of Membrane Computing
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These include P systems with active membranes, P systems with proteins on membranes and tissue P systems, as well as P systems with symport/antiport and membrane division and, finally, spiking neural P ...
We provide a survey of computational complexity results of these membrane models, pointing out some features providing them with their computational strength. ...
the case of P systems with active membranes. ...
doi:10.1007/s41965-019-00017-y
fatcat:4rs3f37vufcwja6fehdwdbqiom
A survey of results on evolution–communication P systems with energy
2020
Journal of Membrane Computing
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We survey results related to the attempt to define communication complexity to P systems. Our P system model would be Evolution-Communication P systems with energy introduced in 2010. ...
Symport and antiport rules are used to communicate multisets across membranes. In ECPe systems, communication rules require some cost to be activated. ...
The results may also be extended to other variants of P system especially those that do not involve active membranes. ...
doi:10.1007/s41965-020-00034-2
fatcat:5ccvgnf5ybaspnd5m75sxgvl7y
Cooperative binding of lactose and the phosphorylated phosphocarrier protein HPr(Ser-P) to the lactose/H+ symport permease of Lactobacillus brevis
1995
Proceedings of the National Academy of Sciences of the United States of America
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These results provide evidence for the direct interaction of HPr(Ser-P) with an allosteric site on the lactose/proton symporter of L. brevis for the purpose of regulating sugar accumulation in response ...
We here demonstrate that [S46D]HPr binds directly to inside-out membrane vesicles of L. brevis that contain the lactose permease. ...
IIAgIc binds to and allosterically inhibits a number of target enzymes and transport systems to control their activities (6, 7) . ...
doi:10.1073/pnas.92.2.417
pmid:7831302
pmcid:PMC42751
fatcat:k5p6j54b4fakxcwjh7xsgjrtva
Computing with cells: membrane systems – some complexity issues
2008
International Journal of Parallel, Emergent and Distributed Systems
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Keywords: membrane system; symport/antiport system; catalytic system; contextsensitive language example the area of membrane computing that was recently selected by the Institute for Scientific Information ...
An essential feature of these systems is the ability to communicate among compartments or between compartments and environment. ...
This was proved for symport/antiport membrane systems working in the generating or the accepting mode (in the second case also for deterministic systems), and for membrane systems with active membranes ...
doi:10.1080/17445760701640266
fatcat:eujjzwjutjetpewq2yp5d3f5ye
Typed Membrane Systems
[chapter]
2010
Lecture Notes in Computer Science
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We introduce and study typing rules and a type inference algorithm for P systems with symport/antiport evolution rules. ...
We exemplify how the type system is working by presenting a typed description of the sodium-potassium pump. ...
A type system for membranes with symport/antiport rules is introduced in Section 2. ...
doi:10.1007/978-3-642-11467-0_13
fatcat:nyqbaugvyjg6jbuiiae7oemtxa
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