Spc42p is a 42-kD component of the S.cerevisiae spindle body that localises to the electron dense central region of the SPB [1].Spc42p is a phosphoprotein which forms a polymeric layer at the periphery of the SPB central plaque. This functions during SPB duplication and also facilitates the attachment of the SPB to the nuclear membrane [1].

1: The yeast spindle pole body is assembled around a central crystal of Spc42p. Bullitt E, Rout MP, Kilmartin JV, Akey CW; Cell. 1997;89:1077-1086. PMID:9215630