Table 1. Molecular weight of conkunitzin-S1 pepsin-digestion products.

Peak†	Measured weight (Da)	Calculated weight‡ (Da)	Disulfide connectivity§
a	2161.46	2161.06	III–V
b	1960.31	1959.99	III–V
c	2407.67	2407.18	I–VI
d	3652.23	3651.76	I–VI and III–V
e	4549.74	4549.23	I–VI and III–V

^†The separation of proteolysis digestion products by HPLC is shown in Fig. 2 ▶(c).

^‡Calculated monoisotopic weight (MH⁺).

^§Cysteines of conkunitzin-S1 are labeled according to the conserved cysteines found in most Kunitz proteins (Fig. 1 ▶).