In such a design, it is expected 2-P, 3-P and 4-P act as the precursors for hydrogelators 2, 3, and 4, respectively. Based on the synthetic procedure used to make 1-P, solid phase peptide synthesis (SPPS) was used to produce 2-P, 3-P, and 4-P. Briefly, the protected phosphotyrosine (Fmoc-pTyr (D or L-enantiomer)) was added to 2-chlorotrityl chloride resin. After capping any open sites on the resin, 20% piperidine was then added to deprotect the amino acid. After several washes with dimethylformamide, the Fmoc protected amino acids Glu, Gly, and Phe (D or L-enantiomers) were subsequently added followed by deprotection with 20% piperidine and several washes between each addition of the amino acid. The peptide was capped with 2-naphthaleneacetic acid and cleaved from the resin with trifluoroacetic acid (TFA), creating the peptides shown in Scheme 1. The same general procedure was used for producing the hydrogelator peptides (1, 2, 3, and 4).