... Absence of these proteins causes arandom insertion of the P1 protein and a cytadher-ence-negative phenotype [13]. P1 is encoded by MPN141 and both, P40 and P90 by MPN142. Thesegenes are organized, ... insight into the function of this protein com-plex, the subunits had to be characterized in detail.The N-terminal end of P90 was determined by Edmandegradation. This protein begins with an arginine ... theamino terminus of this peptide, as read from the genesequence, then this peptide is taken as the N-terminalpeptide of this protein [27]. This is, however, not anexact proof, as such a cleavage...