- Calsequestrin, a calcium sequestering protein localized at the sarcoplasmic reticulum, is not essential for body-wall muscle function in Caenorhabditis elegans. Cho, J.H., Oh, Y.S., Park, K.W., Yu, J., Choi, K.Y., Shin, J.Y., Kim, D.H., Park, W.J., Hamada, T., Kagawa, H., Maryon, E.B., Bandyopadhyay, J., Ahnn, J. J. Cell. Sci. (2000)