TABLE 2.
Parameter | Symbol(s) | Simulation value(s) |
---|---|---|
Cell generation time | μE, μD | 2.23 × 105, 9 × 105 |
Rate of attachment of predator | kE, kD | 4 × 10−7 |
Rate of lysis of bdelloplasts | κ | 3/7 |
Rate of early bdelloplast lysis | η | 17/21 |
No. of progeny per bdelloplast | N | 3.8 |
Detachment of Bdellovibrio from B. subtilis | K | 30 |
Formation of bdelloplast | ɛ | 12 |
Effect of crowding | γE, γB, γD | 4 × 10−5, 5 × 10−4, 1 × 10−4 |
Contribution to crowding effect | θE, θB, θD | 1 × 10−6, 1 × 10−5, 1 × 10−6 |
Amt of dead cell protein | βE, βB, βD | 1.54 × 10−13, 0.1475βE, βE |
Amt of protein from lysed and unlysed bdelloplasts | δL, δU | βE − (N − 1)βB, βE + βB |
Protein degradation | λ | 1.905 × 10−7 |
Amt (g) of usable amino acids per g of degraded protein | φ | 0.95 |
Amt of amino acids required per cell | αE, αD | βE, βD |
Protease production/decay | ρ+, ρ− | 4.2 × 10−17, 0 |
Subscripts indicate the species that the parameters refer to, as follows: E, E. coli (prey); B, Bdellovibrio (predator); D, B. subtilis (decoy); U, unproductive bdelloplast; L, productive bdelloplast. The parameters described previously include kE, κ, ɛ, βE, βB, βD, αE, αD, δL, δU, and λ. The parameters found in experiments include kD, K, and ρ+. The remaining parameter values were obtained by methodically evaluating the mathematical model, with consideration of the biological relevance of the parameter values.