TABLE 2.

Fourier transform ion cyclotron resonance of intact Rpl42ab

Rpl42ab purified from strain	Observed monoisotopic mass	Calculated monoisotopic mass	Error		Modifications observed	% Abundance of methylation statea
	Da	Da	Δmass Da	ppm		%
Wild type	12100.71	12100.70	0.01	0.84	Two methyl groups	78
	12086.70	12086.69	0.01	0.71	One methyl group	22
ΔYbr030w	12086.73	12086.69	0.04	3.57	One methyl group	100
ΔSET7	12086.75	12086.69	0.07	5.38	One methyl group	88
	12072.72	12072.67	0.05	4.34	None	12
ΔYbr030w ΔSET7	12072.68	12072.67	0.01	0.93	None	100

^aCalculated as described under “Experimental Procedures”