def steady_state_tRNA_balance(nu_max,
                              phi_P,
                              growth_rate):
    """
    Computes the steady state value of the charged-tRNA abundance.

    Parameters
    ----------
    nu_max : positive float 
        The maximum nutritional capacity in units of inverse time. 
    phi_P : float [0, 1]
        The fraction of the proteome occupied by metabolic protein mass  
    growth_rate : positive float
        The steady-state growth rate given the parameters

    Returns
    -------
    c_AA : float
        The charged tRNA abunadance given the model parameters. This is defined
        as the mass of the charged-tRNA relative to the total biomass.

    Notes
    -----
    This function assumes that in steady state, the nutrients are in such abundance 
    that the nutritional capacy is equal to its maximal value. 

    """
    return (nu_max * phi_P / growth_rate) - 1