CST1 and cyst: In contrast, the characterization on cyst biology of parasites lacking CST1 (11) or MAG1 (B. Han, T. Tomita, R. Yakubu, V. Tu, J. Mayoral, T. Sugi, Y. Ma, and L. M. Weiss, submitted for publication) showed that these two proteins are important for cystogenesis, reinforcing the model that these two proteins may be crucial components of the cyst wall interactome.