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. Author manuscript; available in PMC: 2008 Jul 1.
Published in final edited form as: Methods. 2007 Jul;42(3):207–219. doi: 10.1016/j.ymeth.2007.02.010

Fig. 5.

Fig. 5

Sequence specificity of c-Src, Grb2 and Csk SH2 domains. Displayed are the amino acids identified at each position from −2 to +3 relative to pY (position 0). Number of occurrence on the y axis represents the number of selected sequences that contain a particular amino acid at a certain position. Key: M, norleucine; C, α-aminobutyric acid. The pY library screened against c-Src and Grb2 SH2 domains did not contain α-aminobutyric acid.