def __init__(self, k_m=5, k_n=20, gamma_m=numpy.log(2) * 60 / 3, gamma_n=numpy.log(2) / 10, m_0=1, n_0=98):
        """
        Args:
            k_m (:obj:`float`, optional): mRNA synthesis rate constant (molecules h\ :sup:`-1`)
            k_n (:obj:`float`, optional): protein synthesis rate constant (\ :sup:`-1`\  h\ :sup:`-1`)