>gi|219842314 brain-derived neurotrophic factor isoform a preproprotein [Homo sapiens] MTILFLTMVISYFGCMKAAPMKEANIRGQGGLAYPGVRTHGTLESVNGPK AGSRGLTSLADTFEHVIEELLDEDQKVRPNEENNKDADLYTSRVMLSSQV PLEPPLLFLLEEYKNYLDAANMSMRVRRHSDPARRGELSVCDSISEWVTA ADKKTAVDMSGGTVTVLEKVPVSKGQLKQYFYETKCNPMGYTKEGCRGID KRHWNSQCRTTQSYVRALTMDSKKRIGWRFIRIDTSCVCTLTIKRGR