3D printed model properties
Standard polylactic acid (PLA) filament used in 3D printing proved too
brittle to enable assembly of Monofoil (and domain-swapped) oligomers
without fracturing. Thermoplastic urethane (TPU) filament was therefore
used for 3D printing of all molecular models. The flexibility of TPU
permitted interface adjustments that tended to promote structural
complementarity of all models. Analysis the printed models shows that
for the scale (2.8 mm/Å) and printing properties utilized, the models
had an average mass of 1.79±0.11 g/amino acid (Table 1).