def _calcgbar(Ip, Vclamp, A=1):
    # Unused
    """
    Estimate (lower bound) the cell's maximum conductance from its peak current
    Ip      :=  Peak current [nA]
    Vclamp  :=  Clamp Voltage [mV]
    A       :=  Cell surface area [um^2]
    return gbar [pS/um^2]
    """
    Gmax = Ip/Vclamp  # Maximum conductance for the whole cell
    gbar = Gmax/A     # Maximum conductance pS / um^2
    return gbar * (1e6)