Table 1. Peptide modifications in six clonal isolates from prolonged nitrogen-limited populations.

Gene	Glutamine-limited clones			Ammonium-limited clones
	I	II	III	IV	V	VI
	Invasive	Invasive	Non-invasive	Non-invasive	Invasive	Invasive
GAP1			Δgap1	S388P	Δgap1
MEP2				G352S
PHO90	T672A
SFL1	Q320 STOP
PTR3		647::CWNKNPLSSIN
GDH1					D206E
SAM4			Synonymous

Denoted are the protein modifications resulting from mutations in the clonal isolates. The corresponding mutations are described in Material and Methods.