IN THE PRIME OF HIS LIFE
A decagonal mini-crossword
Noam D. Elkies, 19 February 2014; improved by George Barany

1 2 3 4 5 6 7
___ ___ ___    1   Alpha _____ (protein-structure motif)
___ ___ ___ ___    2   Bordeaux wine, to Dr. Dulcamara
___ ___ ___ ___ ___ ___ ___    3   Extract by washing or percolation
___ ___ ___ ___ ___ ___    4   _____ diagram (protein-structure visualization)
___ ___ ___ ___ ___    5   _____ average (like every child in Lake Wobegon)
___ ___ ___    6   “Mazel ___!” (“Happy 59th birthday!”)
___ ___ ___    7   Mercedes-Benz suffix, to a jocular organic chemist

No Down clues: this decagon is symmetrical about the main diagonal, and the same words appear Across and Down.