... thoughtthey were able to bind the ST peptide (Fig. 2). Therefore,there appeared to be a correlation between the presence of the 145 kDa form of GC-C, which represents the matureglycosylated form of ... representing the amount of GC-C detected byST binding (Fig. 2C). Therefore, the fraction of GC-Cpresent in the membranes of desensitized cells possessedguanylyl cyclase activity, but this form of the ... onremoval of the ST peptide, which was correlated with areappearance of the 145 kDa form on the cell surface, fol-lowing processing of the endoplasmic reticulum-associatedpool of the 130 kDa...