| Here , we demonstrate that the human FIB N terminal glycine and arginine rich domain ( residues 1 77 ) and its spacer region 1 ( 78 132 ) interact with splicing factor 2 associated p 32 ( SF2A p 32 ) and that the FIB methyltransferase like domain ( 133 321 ) interacts with protein arginine methyltransferase 5 ( PRMT 5 , Janus kinase binding protein 1 ) . ^^^ |