Table 2.

Trans-content of all the prolyl bonds as a percentage

Peptide	Ace–P1	P1–P2	P2–P3	X–P4	P4–P5	P5–P6	Average
PPP	76	80	70 (51)∗	64	80	79	71
PPP′	76	80	71 (67)∗	61	85	86	75
PQP	79	91	62	78	84	81	79
PDP	76	85	74	29	96	93	75
PGP	78	88	71	75	75	79	78
PAP	76	90	58	79	84	80	78
PAP′	76	90	67	71	82	87	79
PKP	77	89	64	69	77	77	76
PSP	76	92	60	83	83	85	80
PEP	75	85	64	76	83	86	78
PHP†	74	91	56	80	80	80	77
PFP	75	87	64	50	85	81	74
PCP	77	90	68	77	80	77	78
PNP	75	90	70	60	88	87	78
PRP	79	89	55	75	86	65	75
PMP	75	87	66	63	85	72	75
PLP	74	87	66	67	87	79	77
PHP‡	75	88	62	46	89	84	74
PTP	78	90	75	79	81	78	80
PWP	75	85	60	44	89	79	72
PIP	75	88	73	80	82	79	79
PVP′	73	87	71	77	82	84	79
PVP	74	90	69	80	82	77	78
PYP	74	87	61	45	86	82	72

^∗The bracketed values belong to the P₃-P bond.

^†His is assumed to be protonated.

^‡His is assumed to be neutral.