Calculate the mz value of a peptide from its mass and charge.

    :param mass: float, exact non protonated mass
    :param charge: int, charge state

    :returns: mass to charge ratio of the specified charge state

def calcMzFromMass(mass, charge):
    """Calculate the mz value of a peptide from its mass and charge.

    :param mass: float, exact non protonated mass
    :param charge: int, charge state

    :returns: mass to charge ratio of the specified charge state
    """
    mz = (mass + (maspy.constants.atomicMassProton * charge)) / charge
    return mz