Add details for integrins

[bgyori]

Some sources:
https://en.wikipedia.org/wiki/Integrin
https://www.genenames.org/data/genegroup/#!/group/1159
https://www.genenames.org/data/genegroup/#!/group/1160

and synonyms to consider handling:

[('integrin', 59572),
 ('integrins', 14660),
 ('Integrin', 4114),
 ('beta1 integrin', 3478),
 ('beta1-integrin', 1653),
 ('integrin alpha', 1286),
 ('disintegrin', 1195),
 ('integrin receptors', 993),
 ('beta1 integrins', 886),
 ('beta3 integrin', 794),
 ('β1-integrin', 578),
 ('integrin receptor', 527),
 ('Integrins', 386),
 ('beta4 integrin', 379),
 ('β1 integrin', 314),
 ('alpha4 integrin', 264),
 ('beta2 integrins', 264),
 ('integrin β1', 234),
 ('alphav integrin', 226),
 ('integrin-beta1', 217),
 ('alpha5beta1 integrins', 192),
 ('alpha6 integrin', 182),
 ('beta1-integrins', 173),
 ('beta 1  integrins', 157),
 ('Integrin alpha', 155),
 ('beta3 integrins', 149),
 ('beta2-integrin', 138),
 ('alphav integrins', 132),
 ('beta-integrin', 130),
 ('αvβ3 integrin', 129),
 ('integrin beta 1', 128),
 ('beta 2  integrins', 113),
 ('integrin beta5', 113),
 ('integrin αIIbβ3', 113),
 ('beta2-integrins', 111),
 ('beta3-integrin', 111),
 ('alphavbeta3 integrins', 108),
 ('integrin alpha 5', 106),
 ('integrins alphavbeta3', 104),
 ('β3 integrin', 101),
 ('β1 integrins', 100),
 ('alpha5beta1-integrin', 99),
 ('integrin beta 3', 98),
 ('α5β1 integrin', 97),
 ('integrin CD11b', 96),
 ('beta5 integrin', 96),
 ('integrin alpha 2', 96),
 ('beta 1 -integrin', 94),
 ('integrin beta1', 93),
 ('alpha4 integrins', 92),
 ('integrin αvβ3', 90),
 ('Disintegrin', 88),
 ('alpha5-integrin', 87),
 ('beta 1 integrins', 86),
 ('integrin alpha 4', 86),
 ('disintegrins', 82),
 ('integrin-', 82),
 ('beta 2 integrins', 78),
 ('beta4-integrin', 76),
 ('integrin-associated protein', 75),
 ('CD18 integrin', 75),
 ('alphavbeta5 integrins', 74),
 ('integrin-beta3', 69),
 ('integrin alpha 6', 69),
 ('integrin α5β1', 66),
 ('alphavbeta3-integrin', 66),
 ('integrin beta 4', 65),
 ('integrin β3', 65),
 ('β2 integrin', 61),
 ('beta 2 -integrins', 60),
 ('alpha6-integrin', 59),
 ('beta 2 -integrin', 59),
 ('β2 integrins', 57),
 ('RGD-binding integrins', 56),
 ('integrin α', 55),
 ('beta(2) integrins', 55),
 ('integrin-linked kinase', 54),
 ('integrin alphaIIbbeta3', 53),
 ('alphaV integrins', 53),
 ('β4-integrin', 52),
 ('alphaV integrin', 51),
 ('Integrin receptors', 51),
 ('integrin β4', 50),
 ('integrin inhibitor', 50),
 ('integrinbeta1', 50),
 ('alpha4-integrin', 49),
 ('α2β1 integrin', 47),
 ('alpha2beta1 integrins', 45),
 ('alpha6beta1 integrins', 45),
 ('beta-integrins', 44),
 ('integrin alpha 3', 44),
 ('α5 integrin', 44),
 ('beta1 Integrin', 44),
 ('anti-integrin antibodies', 43),
 ('integrin beta-1', 42),
 ('alpha6beta4 integrins', 41),
 ('integrin beta3', 41),
 ('α6β4 integrin', 40),
 ('alpha4beta1 integrins', 40),