Table 7.
Analysis of loops C and D in MIPs from different organism groups
| MIP Subfamily | No. of sequences | Length of the loop C | Loops with ≥ 3 Gly | Length of loop D | No. of basic residues in loop D |
|---|---|---|---|---|---|
| Dicot XIP1s | 18 | 33 | All dicot, XIPs | 15 -- 16 | ≥ 3 (19 out of 22) |
| Dicot XIP2s | 4 | 25 | |||
| Moss XIPs | 3 | 31 -- 34 | All | 12-16 | 1 (2 out of 3) |
| Fungi XIPs | 9 | 20 -- 23 | All | 16 | 2 (8 out of 9) |
| All PIPs | 54 | 21 -- 22 | 53 out of 54 | 13 -- 14 | 4 (53 out of 54) |
| All TIPs | 49 | 17 | 40 out of 49 | 9 -- 11 | 2 (41 out of 49) |
| All NIPs | 37 | 16 -- 24 | 12 out of 37 | 8 -- 9 | 1 (32 out of 37) |
| All SIPs | 14 | 14-19 | None | 8 -- 9 | 2 (10 out of 14) |
| Human glycerol transporting AQPsa | 4 | 35 | All | 10 | 0 (2 out of 4) 2 (2 out of 4) |
| Other Human AQPsb | 9 | 20-23 | AQP1, AQP4 | 5 -- 9 | 2 basic (7 out of 9) |
aAQP3, AQP7, AQP9, AQP10 are the human AQP homologs that transport glycerol.
bAQP0, AQP1, AQP2, AQP4, AQP5, AQP6, AQP8, AQP11, AQP12