Tomato Gene Expression

This is a 3D sculpture of a Principal Component Analysis performed on the expression profiles of >20,000 genes from Solanum lycopersicum (domesticated tomato) and a desert relative, Solanum pennellii. Gene expression was sampled in the inflorescence, mature leaf, root, seedling, stem, and vegetative apex. This sculpture is derived from the PCs 1-3 (x, y, z), with each "rod" representing data from a single gene. Data used in this sculpture is derived from the linked publication (http://www.ncbi.nlm.nih.gov/pubmed/23585653). Data pertaining to the PCA is below:

Percent variance explained by each PC:
PC1: 34.4% variance
PC2: 23.9% variance
PC3: 20.1% variance

PC1 loadings
Inflorescence: 0.004
Leaf: 0.239
Root: -0.477
Seedling: 0.379
Stem: -0.461
Vegetative Apex: 0.600

PC2 loadings:
Inflorescence: -0.740
Leaf: 0.646
Root: 0.047
Seedling: 0.015
Stem: 0.096
Vegetative Apex: -0.151

PC3 loadings:
Inflorescence: 0.300
Leaf: 0.354
Root: -0.559
Se