Table 2. Accurate masses of fragments from alanyl-PG.

Observed mass	Calculated mass	Cleavage	Description
168.0623	168.0640	f	cyclo-Ala-Gro + Na +
248.0287	248.0300	d	cyclo-Ala-Gro-Pho+ Na +
266.0395	266.0410	c	Ala-Gro-Pho + Na +
551.5018	551.5040	c	DAG - OH
573.4839	573.4860	c	DAG - H 2O + Na +

Note: The alphabetically labeled scissile bonds are shown in Figure 6 and Figure 7. The abbreviation are the same as in Table 1. Ala - alanine.