Phasing the problem: Polybasic, farnesylated, and fluorescence- or biotin-tagged K-Ras 4B (1) and Rho A peptides can be efficiently synthesized in solution or on a solid support by employment of a combination of Fmoc and Aloc urethanes with trityl groups and a trityl linker. The synthesis methods described in both solid and solution phases present new opportunities for future investigation of areas such as membrane targeting by Ras, Rho, and related lipidated proteins. Biot=biotin, Aca=aminocaproic acid.
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Ludolph et al. (2002) studied this question.