TABLE 7.

Summary of phage and peptide substrates^a

Substrate	HIV-1 PR only	FIV PR only	Both HIV-1 PR and FIV PR	Neither PRc
Phage	GSGIF↓LETSL	GALTN↓AVLVP	GSGIY↓TVQSL
	GSGVF↓VETSL	SGRIN↓VALVP	GSGVF↓VVNGL
	GSGVF↓VEMPL	GAMVN↓QALVP	GSGVY↓HVSTL
	GSGIM↓FESNL	SGVAL/SALVP	GSGVF↓AVTQL
	GSGLF↓TEYGL	GSGVF/YTLVP
	GSGVH↓VEYTL	GSGVY↓QL↓SAL
	GSGNY↓FVETL
	GSGNY↓FVQGL
	GSGNY↓LVTSL
	VSQNY↓PIVQL
	GSGVY↓LATDL
Peptideb	KSGNF↓VVNGLVK	KSGNFVVN↓GLVK	KSGVF↓VVNGLVK	KSGVN / VVNGK
	KSGVF↓VENGLVK	KSGVF↓SVNGK	KSFVF↓VVNGLVK	KSGVQ / VVNGK
	KSGVF↓VQNGLVK	KSGVFHVN↓GLVK	KSGIF↓VVNGLVK	KSGVF / VNNGLVK
		KSGVFQVN↓GLVK	KSGVF↓HVNGK
			KSGVF↓QVNGLVK
			KSGVF↓VVQGLVK
			KSGVF↓VVTGLVK

^aPhage substrates were divided into the categories listed above based on an analysis of Fig. 1. 

^bPeptide substrates were only listed in columns if at least a 100 μM concentration of the substrate was cleaved better than 30% under the conditions listed in Materials and Methods and in Table 2. 

^cProducts of the cleavage of substrates listed in the neither PR column were not detected at all.