LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Src protein domain. Computer model showing the primary (rods) and secondary (alpha helix, blue and beta sheets, purple) structures of the Src homology domain 3 (SH3). This protein domain binds ligands rich in the amino acid proline. It is found in many cytoplasmic proteins, including those that participate in signal transduction pathways.
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