Common acute lymphocytic leukemia antigen (health) and Cross-Thread - Motor Sports (gambling)

Common acute lymphocytic leukemia antigen (health)

(CALLA) A cell surface enzyme with neutral metalloendopeptidase activity that serves as a marker for the common form of ALL (acute lymphocytic leukemia) as well as for Burkitt lymphoma and follicular germinal center lymphoma. CALLA is normally present on the surface of early lymphoid cells as well as on a number of Other types of normal cells, such as especially cells in the kidney.

Cross-Thread - Motor Sports (gambling)

Stripping of the wheel stud threads when crew members hurriedly refasten lug nuts. This can be more devastating in Indy car racing as each wheel has only one center nut/thread combination which, if damaged, necessitates a Pit Pass before more severe consequences take place.

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