- Identification of a 400-kd protein in the brush borders of human kidney tubules that is similar to gp330, the nephritogenic antigen of rat Heymann nephritis. Kerjaschki, D., Horvat, R., Binder, S., Susani, M., Dekan, G., Ojha, P.P., Hillemanns, P., Ulrich, W., Donini, U. Am. J. Pathol. (1987)