TABLE 2.

Parameters used in the model^a

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

^aSubscripts 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 k_E, κ, ɛ, β_E, β_B, β_D, α_E, α_D, δ_L, δ_U, and λ. The parameters found in experiments include k_D, 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.