Try to find cleavage sites in these peptides

>INS_HUMAN (INSULIN PRECURSOR)

MALWMRLLPLLALLALWGPDPAAAFVNQHLCGSHLVEALYLVCGERGFFY


>IGF2_HUMAN
MGIPMGKSMLVLLTFLAFASCCIAAYRPSETLCGGELVDTLQFVCGDRGF

> ADHA_HUMAN (ALCOHOL DEHYDROGENASE ALPHA CHAIN)
MSTAGKVIKCKAAVLWELKKPFSIEEVEVAPPKAHEVRIKMVAVGICGTD