Coefficients P(gamma=1) Pi Dimension Linear(Citrulline) 0.499 0.657 1* Spline(Citrulline) 0.750 0.336   8** Linear(Lysine) 0.006 0.000 1 Spline(Lysine) 0.006 0.000 6 Linear(Histidine) 0.026 -0.003 1 Spline(Histidine) 0.212 0.010 7 Linear(Arginine) 0.016 -0.001 1 Spline(Arginine) 0.015 0.000 7 *:P(gamma=1)>.25; **:P(gamma=1)>.5

Table 4: Marginal posterior inclusion probability and term importance. Shown are the posterior model probabilities from the MCMC 8000 samples from 8 chains, each ran 5000 iterations after a burn-in of 500.