PDB File Archive

/pub/pdb/data/biounit/coordinates/divided/z2/

NameLast ModifiedSize
Parent Directory
1z21.pdb1.gz2025-09-25 06:10:4618.5 KB
1z22.pdb1.gz2025-09-25 06:10:4629.6 KB
1z23.pdb1.gz2025-09-25 06:10:4641.1 KB
1z24.pdb1.gz2025-09-25 06:10:4662.2 KB
1z25.pdb1.gz2025-09-25 06:10:46112.6 KB
1z26.pdb1.gz2025-09-25 06:10:46113.1 KB
1z27.pdb1.gz2025-09-25 06:10:4627.8 KB
1z28.pdb1.gz2025-09-25 06:10:46101.2 KB
1z29.pdb1.gz2025-09-25 06:10:4695.8 KB
1z2a.pdb1.gz2025-09-25 06:10:4628.9 KB
1z2b.pdb1.gz2025-09-25 06:10:46240.7 KB
1z2c.pdb1.gz2025-09-25 06:10:46350 KB
1z2c.pdb2.gz2025-09-25 06:10:46343.1 KB
1z2d.pdb1.gz2025-09-25 06:10:4636.3 KB
1z2e.pdb1.gz2025-09-25 06:10:4636.4 KB
1z2f.pdb1.gz2025-09-25 06:10:4629.3 KB
1z2g.pdb1.gz2025-09-25 06:10:4618.7 KB
1z2i.pdb1.gz2025-09-25 06:10:46114.5 KB
1z2i.pdb2.gz2025-09-25 06:10:46114.7 KB
1z2j.pdb1.gz2025-09-25 06:10:4624 KB
1z2k.pdb1.gz2025-09-25 06:10:4628.5 KB
1z2l.pdb1.gz2025-09-25 06:10:46131.5 KB
1z2m.pdb1.gz2025-09-25 06:10:4625 KB
1z2n.pdb1.gz2025-09-25 06:10:4661.1 KB
1z2o.pdb1.gz2025-09-25 06:10:4661.7 KB
1z2p.pdb1.gz2025-09-25 06:10:4659.8 KB
1z2q.pdb1.gz2025-09-25 06:10:4721 KB
1z2t.pdb1.gz2025-09-25 06:10:477.9 KB
1z2u.pdb1.gz2025-09-25 06:10:4755.9 KB
1z2v.pdb1.gz2025-09-25 06:10:4726.2 KB
1z2v.pdb2.gz2025-09-25 06:10:4726.2 KB
1z2w.pdb1.gz2025-09-25 06:10:4734 KB
1z2w.pdb2.gz2025-09-25 06:10:4733.3 KB
1z2w.pdb3.gz2025-09-25 06:10:4764.9 KB
1z2x.pdb1.gz2025-09-25 06:10:4732.5 KB
1z2x.pdb2.gz2025-09-25 06:10:4731.8 KB
1z2x.pdb3.gz2025-09-25 06:10:4762.4 KB
1z2z.pdb1.gz2025-09-25 06:10:4773.5 KB
1z2z.pdb2.gz2025-09-25 06:10:4774 KB
2z20.pdb1.gz2025-09-25 06:10:47139 KB
2z21.pdb1.gz2025-09-25 06:10:4770.3 KB
2z22.pdb1.gz2025-09-25 06:10:4756.6 KB
2z22.pdb2.gz2025-09-25 06:10:4758.1 KB
2z23.pdb1.gz2025-09-25 06:10:4791.6 KB
2z24.pdb1.gz2025-09-25 06:10:47118 KB
2z25.pdb1.gz2025-09-25 06:10:47120.6 KB
2z26.pdb1.gz2025-09-25 06:10:47250 KB
2z27.pdb1.gz2025-09-25 06:10:47118.2 KB
2z28.pdb1.gz2025-09-25 06:10:47116.4 KB
2z29.pdb1.gz2025-09-25 06:10:47117.3 KB
2z2a.pdb1.gz2025-09-25 06:10:47117.8 KB
2z2b.pdb1.gz2025-09-25 06:10:47108.2 KB
2z2c.pdb1.gz2025-09-25 06:10:47267 KB
2z2d.pdb1.gz2025-09-25 06:10:4743.6 KB
2z2e.pdb1.gz2025-09-25 06:10:4723.3 KB
2z2e.pdb2.gz2025-09-25 06:10:4723.8 KB
2z2f.pdb1.gz2025-09-25 06:10:4726.2 KB
2z2g.pdb1.gz2025-09-25 06:10:4714.6 KB
2z2h.pdb1.gz2025-09-25 06:10:4714.6 KB
2z2i.pdb1.gz2025-09-25 06:10:4730.9 KB
2z2j.pdb1.gz2025-09-25 06:10:4730.9 KB
2z2j.pdb2.gz2025-09-25 06:10:4730.8 KB
2z2k.pdb1.gz2025-09-25 06:10:4729.2 KB
2z2l.pdb1.gz2025-09-25 06:10:47100.6 KB
2z2l.pdb2.gz2025-09-25 06:10:4797.4 KB
2z2m.pdb1.gz2025-09-25 06:10:47101.1 KB
2z2m.pdb2.gz2025-09-25 06:10:4792.5 KB
2z2n.pdb1.gz2025-09-25 06:10:4750.6 KB
2z2o.pdb1.gz2025-09-25 06:10:4755.5 KB
2z2o.pdb2.gz2025-09-25 06:10:4753.9 KB
2z2o.pdb3.gz2025-09-25 06:10:4753.7 KB
2z2o.pdb4.gz2025-09-25 06:10:4753.2 KB
2z2p.pdb1.gz2025-09-25 06:10:4795 KB
2z2r.pdb1.gz2025-09-25 06:10:4782.3 KB
2z2s.pdb1.gz2025-09-25 06:10:4756.9 KB
2z2s.pdb2.gz2025-09-25 06:10:4755.9 KB
2z2s.pdb3.gz2025-09-25 06:10:4753.6 KB
2z2s.pdb4.gz2025-09-25 06:10:4755 KB
2z2t.pdb1.gz2025-09-25 06:10:4740.5 KB
2z2u.pdb1.gz2025-09-25 06:10:4748.3 KB
2z2w.pdb1.gz2025-09-25 06:10:4784.6 KB
2z2w.pdb2.gz2025-09-25 06:10:4743.4 KB
2z2x.pdb1.gz2025-09-25 06:10:4752.7 KB
2z2y.pdb1.gz2025-09-25 06:10:4763.6 KB
2z2y.pdb2.gz2025-09-25 06:10:4762.7 KB
2z2z.pdb1.gz2025-09-25 06:10:4764.9 KB
4z20.pdb1.gz2025-09-25 06:10:47140.7 KB
4z20.pdb2.gz2025-09-25 06:10:47137.7 KB
4z21.pdb1.gz2025-09-25 06:10:4734.4 KB
4z22.pdb1.gz2025-09-25 06:10:47111.8 KB
4z22.pdb2.gz2025-09-25 06:10:47113.8 KB
4z23.pdb1.gz2025-09-25 06:10:4750.9 KB
4z24.pdb1.gz2025-09-25 06:10:47434 KB
4z25.pdb1.gz2025-09-25 06:10:47209.9 KB
4z25.pdb2.gz2025-09-25 06:10:47211.5 KB
4z25.pdb3.gz2025-09-25 06:10:48210.1 KB
4z25.pdb4.gz2025-09-25 06:10:48211.8 KB
4z25.pdb5.gz2025-09-25 06:10:48210 KB
4z25.pdb6.gz2025-09-25 06:10:48211.4 KB
4z26.pdb1.gz2025-09-25 06:10:48208.8 KB
4z26.pdb2.gz2025-09-25 06:10:48209.1 KB
4z26.pdb3.gz2025-09-25 06:10:48211.6 KB
4z26.pdb4.gz2025-09-25 06:10:48211.1 KB
4z27.pdb1.gz2025-09-25 06:10:4880.7 KB
4z28.pdb1.gz2025-09-25 06:10:4883.6 KB
4z29.pdb1.gz2025-09-25 06:10:4858 KB
4z29.pdb2.gz2025-09-25 06:10:4856.3 KB
4z2a.pdb1.gz2026-02-14 18:36:1879.8 KB
4z2b.pdb1.gz2025-09-25 06:10:4882.5 KB
4z2c.pdb1.gz2025-09-25 06:10:48451 KB
4z2d.pdb1.gz2025-09-25 06:10:48427 KB
4z2e.pdb1.gz2025-09-25 06:10:48413.5 KB
4z2f.pdb1.gz2025-09-25 06:10:4850.7 KB
4z2g.pdb1.gz2025-09-25 06:10:4883.1 KB
4z2g.pdb2.gz2025-09-25 06:10:48163 KB
4z2h.pdb1.gz2025-09-25 06:10:4884.9 KB
4z2h.pdb2.gz2025-09-25 06:10:48166.7 KB
4z2i.pdb1.gz2025-09-25 06:10:4889.4 KB
4z2i.pdb2.gz2025-09-25 06:10:48175.7 KB
4z2j.pdb1.gz2025-09-25 06:10:4884.3 KB
4z2j.pdb2.gz2025-09-25 06:10:48165.5 KB
4z2k.pdb1.gz2025-09-25 06:10:4884.4 KB
4z2k.pdb2.gz2025-09-25 06:10:48165.7 KB
4z2l.pdb1.gz2025-09-25 06:10:4884.7 KB
4z2l.pdb2.gz2025-09-25 06:10:48166.4 KB
4z2m.pdb1.gz2025-09-25 06:10:48190.7 KB
4z2n.pdb1.gz2025-09-25 06:10:4849.4 KB
4z2o.pdb1.gz2025-09-25 06:10:4893.6 KB
4z2p.pdb1.gz2025-09-25 06:10:4888.4 KB
4z2q.pdb1.gz2025-09-25 06:10:4854.2 KB
4z2r.pdb1.gz2025-09-25 06:10:48374.4 KB
4z2r.pdb2.gz2025-09-25 06:10:48369.8 KB
4z2s.pdb1.gz2025-09-25 06:10:4828.9 KB
4z2s.pdb2.gz2025-09-25 06:10:4828.2 KB
4z2t.pdb1.gz2025-09-25 06:10:48366.2 KB
4z2t.pdb2.gz2025-09-25 06:10:48362.1 KB
4z2u.pdb1.gz2025-09-25 06:10:48363.4 KB
4z2u.pdb2.gz2025-09-25 06:10:48365.8 KB
4z2v.pdb1.gz2025-09-25 06:10:4888.2 KB
4z2w.pdb1.gz2025-09-25 06:10:48115.1 KB
4z2x.pdb1.gz2025-09-25 06:10:4836.3 KB
4z2x.pdb2.gz2025-09-25 06:10:4835.6 KB
4z2y.pdb1.gz2025-09-25 06:10:48185.5 KB
4z2z.pdb1.gz2025-09-25 06:10:4890.7 KB
5z20.pdb1.gz2025-09-25 06:10:48420 KB
5z20.pdb2.gz2025-09-25 06:10:48427.1 KB
5z21.pdb1.gz2025-09-25 06:10:48429.6 KB
5z22.pdb1.gz2025-09-25 06:10:48173.4 KB
5z23.pdb1.gz2025-09-25 06:10:48239.7 KB
5z24.pdb1.gz2025-09-25 06:10:49143.1 KB
5z24.pdb2.gz2025-09-25 06:10:49140.5 KB
5z25.pdb1.gz2025-09-25 06:10:49103.6 KB
5z26.pdb1.gz2025-09-25 06:10:496.6 KB
5z27.pdb1.gz2025-09-25 06:10:49569.7 KB
5z28.pdb1.gz2025-09-25 06:10:4930.4 KB
5z2b.pdb1.gz2025-09-25 06:10:49564.3 KB
5z2c.pdb1.gz2025-09-25 06:10:4974.3 KB
5z2c.pdb2.gz2025-09-25 06:10:4974.4 KB
5z2c.pdb3.gz2025-09-25 06:10:4971.6 KB
5z2c.pdb4.gz2025-09-25 06:10:4972.8 KB
5z2c.pdb5.gz2025-09-25 06:10:4973 KB
5z2c.pdb6.gz2025-09-25 06:10:4972.9 KB
5z2c.pdb7.gz2025-09-25 06:10:4971.7 KB
5z2c.pdb8.gz2025-09-25 06:10:4971 KB
5z2c.pdb9.gz2025-09-25 06:10:4968.9 KB
5z2d.pdb1.gz2025-09-25 06:10:49182.2 KB
5z2e.pdb1.gz2025-09-25 06:10:49184.1 KB
5z2f.pdb1.gz2025-09-25 06:10:49174.7 KB
5z2g.pdb1.gz2025-09-25 06:10:49157.5 KB
5z2g.pdb2.gz2025-09-25 06:10:4981.3 KB
5z2g.pdb3.gz2025-09-25 06:10:4980.3 KB
5z2h.pdb1.gz2025-09-25 06:10:4960.7 KB
5z2i.pdb1.gz2025-09-25 06:10:4932.1 KB
5z2i.pdb2.gz2025-09-25 06:10:4931.9 KB
5z2j.pdb1.gz2025-09-25 06:10:4998.6 KB
5z2j.pdb2.gz2025-09-25 06:10:49194.7 KB
5z2k.pdb1.gz2025-09-25 06:10:49100.8 KB
5z2k.pdb2.gz2025-09-25 06:10:49199.7 KB
5z2l.pdb1.gz2025-09-25 06:10:49163.5 KB
5z2l.pdb2.gz2025-09-25 06:10:49164.7 KB
5z2l.pdb3.gz2025-09-25 06:10:49159.6 KB
5z2l.pdb4.gz2025-09-25 06:10:49164 KB
5z2l.pdb5.gz2025-09-25 06:10:49157.8 KB
5z2l.pdb6.gz2025-09-25 06:10:49167 KB
5z2m.pdb1.gz2025-09-25 06:10:4954.7 KB
5z2m.pdb2.gz2025-09-25 06:10:4953 KB
5z2n.pdb1.gz2025-09-25 06:10:4921.8 KB
5z2n.pdb2.gz2025-09-25 06:10:4922.4 KB
5z2o.pdb1.gz2025-09-25 06:10:496.8 KB
5z2p.pdb1.gz2025-09-25 06:10:49365.4 KB
5z2p.pdb2.gz2025-09-25 06:10:49366.9 KB
5z2q.pdb1.gz2025-09-25 06:10:4986.6 KB
5z2q.pdb2.gz2025-09-25 06:10:4988.8 KB
5z2r.pdb1.gz2025-09-25 06:10:49695.9 KB
5z2r.pdb2.gz2025-09-25 06:10:49700.4 KB
5z2s.pdb1.gz2025-09-25 06:10:4926 KB
5z2t.pdb1.gz2025-09-25 06:10:4975.6 KB
5z2u.pdb1.gz2025-09-25 06:10:49371.5 KB
5z2u.pdb2.gz2025-09-25 06:10:49373.1 KB
5z2v.pdb1.gz2025-09-25 06:10:49124.1 KB
5z2w.pdb1.gz2025-09-25 06:10:4940.6 KB
5z2x.pdb1.gz2025-09-25 06:10:50123.9 KB
5z2x.pdb2.gz2025-09-25 06:10:50123.3 KB
6z20.pdb1.gz2025-09-25 06:10:5095.3 KB
6z20.pdb2.gz2025-09-25 06:10:5097.2 KB
6z21.pdb1.gz2025-09-25 06:10:50134.1 KB
6z22.pdb1.gz2025-09-25 06:10:50135.2 KB
6z23.pdb1.gz2025-09-25 06:10:50139.6 KB
6z24.pdb1.gz2025-09-25 06:10:50131.3 KB
6z25.pdb1.gz2025-09-25 06:10:50141.1 KB
6z26.pdb1.gz2025-09-25 06:10:5069.1 KB
6z26.pdb2.gz2025-09-25 06:10:5071.3 KB
6z27.pdb1.gz2025-09-25 06:10:50145 KB
6z28.pdb1.gz2025-09-25 06:10:5058.1 KB
6z29.pdb1.gz2025-09-25 06:10:5035.9 KB
6z2a.pdb1.gz2025-12-07 03:56:4092.8 KB
6z2a.pdb2.gz2025-12-07 03:56:4091.4 KB
6z2b.pdb1.gz2025-09-25 06:10:5035.3 KB
6z2b.pdb2.gz2025-09-25 06:10:5038.4 KB
6z2b.pdb3.gz2025-09-25 06:10:5035.2 KB
6z2b.pdb4.gz2025-09-25 06:10:5035.2 KB
6z2c.pdb1.gz2025-09-25 06:10:5062.6 KB
6z2c.pdb2.gz2025-09-25 06:10:5061.4 KB
6z2c.pdb3.gz2025-09-25 06:10:5061.4 KB
6z2d.pdb1.gz2025-09-25 06:10:5060.9 KB
6z2f.pdb1.gz2025-09-25 06:10:50164.1 KB
6z2g.pdb1.gz2025-09-25 06:10:5033.4 KB
6z2h.pdb1.gz2025-09-25 06:10:50332.9 KB
6z2i.pdb1.gz2025-09-25 06:10:5050.3 KB
6z2j.pdb1.gz2025-09-25 06:10:50325.6 KB
6z2k.pdb1.gz2025-09-25 06:10:50652.1 KB
6z2l.pdb1.gz2025-09-25 06:10:50209.3 KB
6z2m.pdb1.gz2025-09-25 06:10:50246.3 KB
6z2m.pdb2.gz2025-09-25 06:10:50245.3 KB
6z2o.pdb1.gz2025-09-25 06:10:5061.9 KB
6z2p.pdb1.gz2025-09-25 06:10:5059.6 KB
6z2q.pdb1.gz2025-09-25 06:10:5059.9 KB
6z2s.pdb1.gz2025-09-25 06:10:50220.5 KB
6z2t.pdb1.gz2025-09-25 06:10:5033 KB
6z2u.pdb1.gz2025-09-25 06:10:5023.1 KB
6z2v.pdb1.gz2025-09-25 06:10:50115.6 KB
6z2w.pdb1.gz2025-09-25 06:10:50821.9 KB
6z2x.pdb1.gz2025-09-25 06:10:50821.5 KB
6z2z.pdb1.gz2025-09-25 06:10:5023.3 KB
7z20.pdb1.gz2025-09-25 06:10:501.5 MB
7z21.pdb1.gz2025-09-25 06:10:5097.8 KB
7z21.pdb2.gz2025-09-25 06:10:5097.4 KB
7z22.pdb1.gz2025-09-25 06:10:50328.7 KB
7z23.pdb1.gz2025-09-25 06:10:50165.4 KB
7z24.pdb1.gz2025-09-25 06:10:50148.1 KB
7z25.pdb1.gz2026-02-28 06:53:3181.1 KB
7z26.pdb1.gz2025-09-25 06:10:5028.2 KB
7z26.pdb2.gz2025-09-25 06:10:5028.6 KB
7z27.pdb1.gz2025-09-25 06:10:5057.7 KB
7z28.pdb1.gz2025-09-25 06:10:50299.8 KB
7z29.pdb1.gz2025-09-25 06:10:50148.1 KB
7z2a.pdb1.gz2025-09-25 06:10:50227.4 KB
7z2b.pdb1.gz2025-09-25 06:10:51300.4 KB
7z2c.pdb1.gz2025-09-25 06:10:51224.8 KB
7z2d.pdb1.gz2025-09-25 06:10:51152.9 KB
7z2e.pdb1.gz2025-09-25 06:10:51150.7 KB
7z2g.pdb1.gz2025-09-25 06:10:51150.1 KB
7z2h.pdb1.gz2025-09-25 06:10:51150 KB
7z2i.pdb1.gz2025-09-25 06:10:5183.9 KB
7z2j.pdb1.gz2025-12-07 03:56:4072 KB
7z2k.pdb1.gz2025-09-25 06:10:51198.5 KB
7z2l.pdb1.gz2025-09-25 06:10:5167.2 KB
7z2l.pdb2.gz2025-09-25 06:10:5169.5 KB
7z2l.pdb3.gz2025-09-25 06:10:5167.1 KB
7z2l.pdb4.gz2025-09-25 06:10:5167.6 KB
7z2m.pdb1.gz2025-09-25 06:10:51346.9 KB
7z2m.pdb2.gz2025-09-25 06:10:51351.6 KB
7z2n.pdb1.gz2025-09-25 06:10:51735.2 KB
7z2o.pdb1.gz2025-09-25 06:10:51143.9 KB
7z2p.pdb1.gz2025-09-25 06:10:51736.6 KB
7z2q.pdb1.gz2025-09-25 06:10:5168.1 KB
7z2r.pdb1.gz2025-09-25 06:10:51122.8 KB
7z2r.pdb2.gz2025-09-25 06:10:51123.3 KB
7z2s.pdb1.gz2025-09-25 06:10:51135.6 KB
7z2t.pdb1.gz2025-09-25 06:10:51136.7 KB
7z2u.pdb1.gz2025-09-25 06:10:5189.7 KB
7z2v.pdb1.gz2025-09-25 06:10:5194.4 KB
7z2w.pdb1.gz2025-09-25 06:10:51135.7 KB
7z2x.pdb1.gz2025-09-25 06:10:5192.5 KB
7z2x.pdb2.gz2025-09-25 06:10:5192 KB
7z2y.pdb1.gz2025-09-25 06:10:51137 KB
8z20.pdb1.gz2025-09-25 06:10:51161.7 KB
8z20.pdb2.gz2025-09-25 06:10:51161.2 KB
8z21.pdb1.gz2025-09-25 06:10:51189.5 KB
8z22.pdb1.gz2025-10-25 21:32:33160 KB
8z24.pdb1.gz2025-09-25 06:10:51155.2 KB
8z26.pdb1.gz2025-09-25 06:10:51150.8 KB
8z27.pdb1.gz2025-09-25 06:10:51318.5 KB
8z28.pdb1.gz2025-09-25 06:10:5174.8 KB
8z29.pdb1.gz2025-09-25 06:10:51414.7 KB
8z2a.pdb1.gz2025-09-25 06:10:51385.4 KB
8z2b.pdb1.gz2025-09-25 06:10:51413.6 KB
8z2c.pdb1.gz2025-09-25 06:10:51443.2 KB
8z2d.pdb1.gz2025-09-25 06:10:51157.2 KB
8z2e.pdb1.gz2025-11-09 05:34:23120.1 KB
8z2f.pdb1.gz2025-09-25 06:10:51360.6 KB
8z2g.pdb1.gz2025-09-25 06:10:5144.9 KB
8z2g.pdb2.gz2025-09-25 06:10:5144 KB
8z2l.pdb1.gz2025-09-25 06:10:51177.6 KB
8z2l.pdb2.gz2025-09-25 06:10:51177.5 KB
8z2m.pdb1.gz2025-09-25 06:10:51198.1 KB
8z2o.pdb1.gz2025-09-25 06:10:5195.4 KB
8z2q.pdb1.gz2025-09-25 06:10:51184 KB
8z2q.pdb2.gz2025-09-25 06:10:51184.2 KB
8z2q.pdb3.gz2025-09-25 06:10:51183.5 KB
8z2q.pdb4.gz2025-09-25 06:10:52184.5 KB
8z2r.pdb1.gz2025-09-25 06:10:52182 KB
8z2r.pdb2.gz2025-09-25 06:10:52184.4 KB
8z2r.pdb3.gz2025-09-25 06:10:52181.8 KB
8z2r.pdb4.gz2025-09-25 06:10:52185.8 KB
8z2s.pdb1.gz2025-09-25 06:10:52186.1 KB
8z2s.pdb2.gz2025-09-25 06:10:52186.7 KB
8z2s.pdb3.gz2025-09-25 06:10:52186.2 KB
8z2s.pdb4.gz2025-09-25 06:10:52184.8 KB
8z2t.pdb1.gz2025-09-25 06:10:52350 KB
8z2u.pdb1.gz2025-09-25 06:10:52176.6 KB
8z2u.pdb2.gz2025-09-25 06:10:52176.3 KB
8z2v.pdb1.gz2025-09-25 06:10:52191.4 KB
8z2x.pdb1.gz2025-09-25 06:10:5265.7 KB
8z2y.pdb1.gz2025-09-25 06:10:52239.8 KB
8z2z.pdb1.gz2025-11-09 05:34:23191.3 KB
9z2i.pdb1.gz2025-11-22 05:33:4590.8 KB
9z2l.pdb1.gz2025-11-22 05:33:4550.8 KB
9z2l.pdb2.gz2025-11-22 05:33:4548.7 KB
9z2m.pdb1.gz2026-04-26 12:19:07227.2 KB
9z2v.pdb1.gz2026-04-26 12:19:07206.1 KB
9z2x.pdb1.gz2025-11-22 05:33:45317.8 KB
9z2y.pdb1.gz2025-11-22 05:33:45316.9 KB
9z2z.pdb1.gz2025-11-22 05:33:46320 KB