The correct spelling of the word "ASTALT" is actually "aspartate aminotransferase," which is an enzyme found in the liver and heart. Its function is to catalyze the transfer of an amino group from aspartate to alpha-ketoglutarate, which produces oxaloacetate and glutamate. The IPA phonetic transcription for this word is /əˌspɑrtət əˌminəʊˈtrænsfəreɪz/, with the primary stress on "min" and the secondary stress on "trans." Correct spelling is crucial in the medical field to ensure accurate communication and understanding among healthcare professionals.