- Thyroid hormone-deficient period prior to the onset of hearing is associated with reduced levels of beta-tectorin protein in the tectorial membrane: implication for hearing loss. Knipper, M., Richardson, G., Mack, A., Müller, M., Goodyear, R., Limberger, A., Rohbock, K., Köpschall, I., Zenner, H.P., Zimmermann, U. J. Biol. Chem. (2001)