Table 1.

Polyions Used in the Analysis of Mobility Ratios as a Function of Fractional Charge

polyion	molar mass	number of variants	BGE	pH	reference
ssDNA-16a	5.3 × 103	7	20 mM Na cacodylate	6.7	13
ssDNA-20,23a	~7.1 ×103	2,2	20 mM HEPES	7.5	19
ssDNA-8a	2.6 × 103	2	20 mM HEPES	7.5	this workb
dsDNA-20,23a	~7.1 × 103	2,2	20 mM K diethyl-malonate	7.5	19
dsDNA-118a	78 × 103	7	40 mM Tris acetate	8.0	25
dsDNA-99a	65 × 103	4	20 mM K diethyl-malonate	7.5	19
benzene-COOH	~122	4	5.5 mM Na borate	9.2	12
naphthalene-azo dyes	230 – 448	7	~1 mM Na acetate	4.75	11
AMP, ADP, ATP, cyclic A	330 – 510	4	40 mM Tris acetate	8.3	26
BCA	29.3 × 103	21	25 mM Tris glycine	8.4	21
peptides	780 – 960	7	20 mM Na citrate	2.5	14
polyacrylamide/acrylic acid copolymers	~280 × 103	8	10 mM Tris chloride	8.2	15
polyacrylamide/Amps copolymers	~50 × 103	7	50 mM phosphate	6.4	16
polyacrylamide/Amps copolymers	~250 × 103	6	12 mM ammediol/anisic acid	8.8	18
Na PSS	~ 250 ×103	5	40 mM Na borate	8.3	17

^aThe number at the end of the acronym corresponds to the number of bases or base pairs in the molecule.

^bMobility of control oligomer estimated from Ref. (27).