TABLE 1.

Mass spectrometric analysis of DHBV L phosphopeptides

Peptide	Radioactivity (%)	Average mass (Da)
		Determined	Calculateda
Major AspN	90	4,221.8
			4,220.6
Minor AspNb	10	4,282.2
Tryptic 1	40	2,583.6
			2,566.7
Tryptic 2	34	2,569.5

^aFor AspN and tryptic monophosphopeptides comprising amino acid residues 93 to 127 and 103 to 123 respectively (Fig. 2). 

^bMarked with an asterisk in Fig. 1C.