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. 2012 Aug 10;8:31. doi: 10.1186/1746-4811-8-31

Figure 5.

Figure 5

Experimental procedures for extraction and derivatization of auxin and auxin precursors. Tissue homogenization and addition of internal standards corresponds to Steps 2–3. Each homogenized sample is split into two aliquots. (A) Extraction and derivatization of indole-3-pyruvic acid (IPyA). Corresponds to Steps 4–23 and Step 67. (B) Extraction and derivatization of indole-3-acetic acid (IAA) and indole-3-butyric acid (IBA). Corresponds to Steps 24–26, 30–52, and Step 69. (C) Extraction and derivatization of tryptophan. Corresponds to Steps 53–66 and Step 70. (D) Extraction of indole. Corresponds to Steps 24–29 and Step 68.