In the various cellular events of inflammation,

Rolling is due to selectins

 Adhesion is due to integrins

LAD 1:

LAD1 is due to defect in β2 integrins.

Characterised by persistent leucocytosis, delayed separation of umbilical cord and recurrent infections

LAD 2:

LAD 2 is due to deficiency of Selectins

Characterised by recurrent infections

Can be associated with Bombay Blood group