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There are 4 nine-letter words beginning with PROTA

PROTAMINE	• protamine n. (Biochemistry) Any of various strongly basic proteins of relatively low molecular weight that are rich… • PROTAMINE n. any of a class of simple basic proteins which occur combined with nucleic acids (esp. in fish sperm), also PROTAMIN.
PROTAMINS	• protamins n. Plural of protamin. • PROTAMIN n. any of a class of simple basic proteins which occur combined with nucleic acids (esp. in fish sperm), also PROTAMINE.
PROTANDRY	• protandry n. (Biology) The condition in which an organism begins life as a male and then changes into a female. • protandry n. (Botany) The condition of flowers whose male parts mature before the female ones. • protandry n. (Ethology) The arrival of males before females at a mating site.
PROTANOPE	• protanope n. A person who has protanopia. • PROTANOPE n. a sufferer from protanopia, colour-blindness with respect to red.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 11 words
Scrabble in French: 2 words
Scrabble in Spanish: 2 words
Scrabble in Italian: no word
Scrabble in German: no word
Scrabble in Romanian: 22 words

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