A comparative analysis of L1 retrotransposition activities in human genomes suggests an ongoing increase in L1 number despite an evolutionary trend towards lower activity

Table 2 Results of speciation-extinction models fitted to L1 phylogenetic tree with binary retrotransposition activity data

Constraint	Df	Parameter values	Log likelihood	AIC
Unconstrained	6	λ₀ = 10, λ₁ = 412, μ₀ = 0, μ₁ = 0, q₀₁ = 30, q₁₀ = 359	609.54	− 1207.09
μ₀ = μ₁	5	λ₀ = 10, λ₁ = 412, μ₀ = μ₁ = 0, q₀₁ = 31, q₁₀ = 360	609.54	− 1209.09
λ₀ = λ₁	5	λ₀ = λ₁ = 167, μ₀ = 0, μ₁ = 0, q₀₁ = 30, q₁₀ = 211	550.67	− 1091.35
q₀₁ = q₁₀	5	λ₀ = 14, λ₁ = 1510, μ₀ = 0, μ₁ = 1399, q₀₁ = q₁₀ = 159	587.12	− 1164.23
μ₀ = μ₁ = 0	4	λ₀ = 10, λ₁ = 412, q₀₁ = 31, q₁₀ = 360	609.54	− 1211.09
λ₀ = 0	5	λ₁ = 403, μ₀ = 0, μ₁ = 0, q₀₁ = 42, q₁₀ = 370	606.65	− 1203.3
q₀₁ = 0	5	λ₀ = 9, λ₁ = 361, μ₀ = 7, μ₁ = 0, q₁₀ = 275	607.43	− 1204.86
μ₀ = μ₁ = λ₀ = 0	3	λ₁ = 406, q₀₁ = 43, q₁₀ = 372	606.65	−1207.3
μ₀ = μ₁ = q₀₁ = 0	3	λ₀ = 9, λ₁ = 357, q₁₀ = 270	607.42	− 1208.83

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