DOC-2 has a phosphotyrosine interactingdomain (PID) on in its N-terminus and multiple proline-rich SH3 binding motifs in its C- terminus.

• 在其氨基端含有磷酸酪氨酸作用结构域(phosphotyrosine interactingdomain，PID/PTB domain)，羧基端含有多个富含脯氨酸的SH3结合区。