ATYR 1923 is an engineered fusion protein .
aTyr 's second IND candidate , ATYR 1923 ( iMod. Fc ) , was selected in November 2015 .
ATYR 1923 is an engineered ATYR 1923   .
aTyr 's second IND candidate , ATYR 1923 ( iMod. Fc ) , was selected in November 2015 .