https://www.biorxiv.org/content/biorxiv/early/2016/04/30/037689.full.pdf https://academic.oup.com/mbe/article/34/1/204/2656188
module NSCodon = Codon.Universal_genetic_code.NSmodule NSCodon_rate_matrix : sig ... endtype param = {nucleotide_rates : Rate_matrix.Nucleotide.t;nucleotide_stat_dist : Nucleotide.vector;omega : float;scaled_fitness : Amino_acid.vector;gBGC : float;pps : float;}val random_param :
Gsl.Rng.t ->
nucleotide_process:Nucleotide_process.t ->
alpha:float ->
paramval flat_param : unit -> paramval rate_matrix : param -> NSCodon_rate_matrix.tval stationary_distribution : param -> NSCodon.vectorval transition_probability_matrix : param -> float -> NSCodon.matrix