HLA system
noun
human leucocyte antigen system; a group of the most important antigens responsible for tissue compatibility, together with the genes that encode them. For tissue and organ transplantation to be successful there needs to be a minimum number of HLA differences between the donor's and recipient's tissue
QUIZZES
TAKE THIS QUIZ TO SEE WHAT YOU KNOW ABOUT HIGH SCHOOL PUNCTUATION!
Commas mark divisions in sentences. Periods end declarative sentences. Apostrophes show possession. Easy, right? Well, punctuation can get pretty tricky—fast. Think you got what it takes to be a punctuation expert? Take our quiz to prove it!
Question 1 of 10
Which of the options below is the best punctuation for the sentence? It__s your turn to pick the movie __ but your sister gets to pick the board game we _ re going to play.
Its your turn to pick the movie but your sister gets to pick the board game we’re going to play.
It’s your turn to pick the movie but your sister gets to pick the board game were going to play.
It’s your turn to pick the movie, but your sister gets to pick the board game we’re going to play.
TAKE THE QUIZ TO FIND OUTCollins English Dictionary - Complete & Unabridged 2012 Digital Edition
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