<prompt> A patient presents with recurrent kidney stones. The microscopic examination of the urine specimen is shown below. Which of the following is not seen in the urine of this patient?cysteinelysineArgininecystine  <response>: COMPOSITION SHAPE OF THE STONE Calcium oxalate monohydrate Dumbell shape Calcium oxalate dihydrate Envelope Clcium phosphate Flat shaped prisms Struvite coffin-lid Uric acid Rhomboid Cystine Hexagonal Reference: Harpers illustrated biochemistry 30th edition 