, Elemental analysis calcd. for C 42 H 70 N 14 O 32 P 6 S 2 · 6 NH 4 ·2 H 2 O: %C 30.15, %H 5.66, %N 16.74; found %C 27, 100 mL of 1 M Tris-Cl, vol.42

. Hz,

, Polyketide synthases and non-ribosomal peptide synthases are exceptions to this rule and often accept acylated N-acetylcysteamines. Such synthases first catalyze transacylation to a covalentlylinked thioester intermediate, which is the actual substrate for subsequent conversions

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, The current price is approximately $200 for 10 milligrams with >85% purity

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, Adding cross-links to the polymeric reagent likely would have solved this issue; however, the need to regenerate reduced phosphine from the polymeric phosphine oxide by-product discouraged our further efforts in this area

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, Both UV absorbance and elemental analysis results were consistent with this purity assessment

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