ID 6.3.2.51 DE phosphopantothenate--cysteine ligase (ATP). AN phosphopantothenoylcysteine synthetase. CA (R)-4'-phosphopantothenate + ATP + L-cysteine = AMP + diphosphate + H(+) CA + N-[(R)-4-phosphopantothenoyl]-L-cysteine. DR Q8GXR5, PPCS1_ARATH; Q9HAB8, PPCS_HUMAN ; Q8VDG5, PPCS_MOUSE ; //