Wool and hair samples were obtained from fleeces representative of 40 adult
animals (20 Barki ewes and 20 Baladi does). Wool and hair samples were divided into
two types of fibres, coarse and fine for wool and outer and inner coat for goat hair
fibres to compare the chemical composition of fibres in relation to its physical
characteristics in sheep and goats. Measurements were made on some physical
characteristics of fibres in relation to the chemical composition.No significant differences in amino acid composition were found between the two species (sheep and goats). The amounts of the amino acids pro. and tyro were . richer in wool than in hair fibre samples and the opposite was encountered amino acid cys., Iys. and argo which were richer in hair than in wool fibres. The amino acid composition of different types of fibres (coarse and fine wool
and outer and inner coat of goats' hair fibres) indicated no significant differences
between amino acid composition of the two types of fibres. The present results showed high significant correlation coefficients (P<0.01) that ranged between (0.7 to 0.9) between some amino acids. There were numerous values of medium and low magnitude of simple correlation. The present study conduded that increasing content of pro., gly. and cys. in
wool fibres corresponded with increments in STL and CF and a decrease in FD,
medullated fibres% and K%. However the Increment In amino acid Iys. in wool fibre
content corresponded with increment in STL, FD, medullated fibre percentage and
KO/O and a decrease in CF/cm.