A Y341 --> F mutant of Syk , which is deficient in its interaction with phospholipase Cy1 and Vav , was less efficient than wild-type Syk .
a y341 --> f mutant of syk , which is deficient in its interaction with phospholipase cy1 and vav , was less efficient than wild-type syk .
O B-amino_acid_monomer O B-protein_molecule I-protein_molecule O B-protein_molecule O O O O O O O O B-protein_molecule I-protein_molecule O B-protein_molecule O O O O O B-protein_molecule B-protein_molecule O