The lipocalins are a family of extra cellular proteins that bind and transport small hydrophobic molecules.This family demonstrates a great diversity at the sequence level.Lipocalins family members are characterized by several common molecular recognition properties;ability to bind a range of small hydrophobic molecules,binding to specific cell-surface receptors and the formation of complexes with soluble macromolecules.Most of the lipocalins share three characteristic conserved sequence motifs, the kernel lipocalins, while a group of more divergent family members, the outlier lipocalins, share only one.
The structure is an eight-stranded beta barrel.This database contains the information of Accession No.(NCBI), Protein length, Lipocalin region, Protein sequence, Domain Region, AccessionNo.(PROSITE), Pattern, Pattern description, Accession No.(Pfam), Description about Lipocalin. The family also encompasses the enzyme prostaglandin D synthase(EC:5.3.99.2) Lipocalin Protein family database comprises detailed information of Lipocalin Protein Family in 50 mammals.

1. Homo sapiens (Human)
2. Mus musculus (House mouse)
3. Rattus norvegicus (Norway rat)
4. Bos Taurus (cattle)
5. Pan troglodytes (chimpanzee)
6. Canis lupus familiaris (dog)
7. Sus scrofa (pig)
8. Felis catus (cat)
9. Macaca mulatta(rhesus monkey)
10. Spermophilus tridecemlineatus(thirteen-lined ground quirrel)
11. Mus caroli (Ryukyu mouse)
12. Pongo pygmaeus (orangutan)
13. Rattus rattus (black rat)
14. Ovis aries (sheep)
15. Equus caballus (horse)
16. Callithrix jacchus (white-tufted-ear marmoset)
17. Elephas maximus (Asiatic elephant)
18. Macropus giganteus (eastern gray kangaroo)
19. Papio cynocephalus (yellow baboon)
20. Varecia variegata variegate
21. Cervus elaphus (red deer)
22. Myotis lucifugus (little brown bat)
23. Ursus arctos (brown bear)
24. Bubalus bubalis (water buffalo)
25. Trichosurus vulpecula (silver-gray brushtail possum)
26. Macropus eugenii (tammar wallaby)
27. Macaca fascicularis (crab-eating macaque)
28. Mesocricetus auratus (golden hamster)
29. Tarsius bancanus (Horsfield's tarsier)
30. Equus asinus (ass)
31. Babyrousa babyrussa (babirusa)
32. Cynocephalus variegates (Malayan flying lemur)
33. Otolemur crassicaudatus (thick-tailed bush baby)
34. Oryctolagus cuniculus (rabbit)
35. Ornithorhynchus anatinus (platypus)
36. Rangifer tarandus (reindeer)
37. Capra hircus (goat)
38. Cavia porcellus (domestic guinea pig)
39. Meriones unguiculatus (Mongolian gerbil)
40. Ovis aries musimon (mouflon)
41. Cricetus cricetus (black-bellied hamster)
42. Macaca fuscata fuscata (Japanese macaque)
43. Setonix brachyurus (quokka)
44. Lagothrix lagotricha (common woolly monkey)
45. Gorilla gorilla gorilla (Western lowland gorilla)
46. Colobus guereza (guereza)
47. Phodopus sungorus
48. Hystrix cristata (Crested porcupine)
49. Bos grunniens (domestic yak)
50. Monodelphis domestica (gray short-tailed opossum).