Table 1. Summary of 2D crystallization trials.

Protein	Organism	(Putative) Function	MW (kDa)	pI	TMD	N-term	% TM	Screens	Best Outcome
E2P1	M.voltae	Protease	25.9	8.7	4	Inside	45	4	Sheets, Tubes
E2P2	M.maripaludis	Protease	25.9	5.0	4	Inside	39	3	Sheets, Tubes,
E2P3	M.marisnigri	Protease	31.8	5.3	7	Inside	59	2	Sheets, Tubes
E2P4	M.hungatei	Protease	32.9	7.8	9	Inside	61	2	Sheets, Tubes
P2A3	S.oneidensis	Cation efflux family protein	32.5	5.4	5	Inside	36	5	Helical crystals
Rhomboid PA3086	P.aeruginosa	Intramembrane protease	31.8	9.9	6	Inside	45	4	Lipidic structures
YkgB-D332	E.coli	Unknown	21.9	6.0	3	Inside	38	1	Tubes
YkgB-D36	E.coli	Unknown	21.8	5.7	3	Inside	37	4	Helical crystals
β1-adrenergic receptor	M.gallopavo	G-protein coupled receptor	54.1	9.3	7	Outside	33	3	Sheets, Tubes
Rhomboid GlpG	E.coli	Intramembrane protease	31.3	9.2	6	Inside	46	1	Aggregates
Cytochrome b561	P.aeruginosa	Electron carrier activity	20.6	9.6	4	Inside	47	1	Lipidic structures
E1 protein	Semliki Forest Virus	Inducer of membrane fusion	47.4	7.6	0 (1)	Outside	5	4	Sheet crystals
P40B7	B.subtilis	Sporulation kinase C	48.8	6.3	2	Inside	10	1	Vesicles, Sheets
Kdp-ATPase (4 subunits)	E.coli	High-affinity K-pump	159.2	5.2–9.4	17	3 in, 1out	31	1	Sheets, Tubes
P39H10	K. pneumoniae	Diguanylate cyclase	45.7	6.5	2	Inside	11	1	Sheets, Tubes

PI: isoelectric point; TMD: transmembrane domain; N-Term: location of N-teminus; %TM: % of transmembrane sequence ; Screens: Number of screens