Table 5.

Amino acids (AAs) making nonbonding contact (≤0.5 nm distance) with active sites of mouse 20S iCP and cCP

AA No.	AAs making nonbonding contact with their own Thr1
	β 1c	β 1i	β 2c	β 2i	β 5c	β 5i
1	Thr2	Thr2	Thr2	Thr2	Thr2	Thr2
2	Ile3	Ile3	Ile3	Ile3	Thr3	Thr3
3	Asp17	Asp17	Asp17	Asp17	Asp17	Asp17
4	Arg19	Arg19	Arg19	Arg19	Arg19	Arg19
5	Lys33	Lys33	Lys33	Lys33	Lys33	Lys33
6	Arg45	Leu45	Gly45	Gly45	Met45	Met45
7	Ser46	Ser46	Ala46	Ala46	Ala46	Ser46
8	Gly47	Gly47	Gly47	Gly47	Gly47	Gly47

PDB id: 3UNE for cCP and 3UNH for iCP. Neutral AAs are colored black, electropositive and basic AAs are colored blue, and electronegative and acidic AAs are colored red (Note: for interpretation of the references to color in this figure legend, the reader is referred to the web version of this article)