- Calvasculin, an encoded protein from mRNA termed pEL-98, 18A2, 42A, or p9Ka, is secreted by smooth muscle cells in culture and exhibits Ca(2+)-dependent binding to 36-kDa microfibril-associated glycoprotein. Watanabe, Y., Usuda, N., Tsugane, S., Kobayashi, R., Hidaka, H. J. Biol. Chem. (1992)