TABLE 3.

Nitrogen source conditions in which gltBD fitness > −1.5, illustrated by the scatterplot in Fig. 2A

Conditions in which GltBD fitness is >−1.5
Condition	GltBD fitness
l-isoleucine	+0.20
butyrolactam	+0.12
l-pyroglutamic acid	+0.10
l-valine	+0.08
l-phenylalanine	+0.04
l-aspartate	−0.07
l-glutamic acid	−0.15
l-proline	−0.16
l-glutamine	−0.32
4-aminobutyric acid	−0.45